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131097512 = 237133137157
BaseRepresentation
bin1111101000001…
…10001110101000
3100010200102222102
413310012032220
5232030110022
621001512532
73151211330
oct764061650
9303612872
10131097512
1168001557
1237aa2748
13212111c0
14135a80c0
15b798a92
hex7d063a8

131097512 has 128 divisors (see below), whose sum is σ = 322775040. Its totient is φ = 48522240.

The previous prime is 131097509. The next prime is 131097517. The reversal of 131097512 is 215790131.

It is a taxicab number since it can be written as a sum of two cubes in more than one way. Here 131097512 = 103 + 5083 = 3943 + 4123.

It is not an unprimeable number, because it can be changed into a prime (131097517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 834938 + ... + 835094.

It is an arithmetic number, because the mean of its divisors is an integer number (2521680).

Almost surely, 2131097512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131097512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161387520).

131097512 is an abundant number, since it is smaller than the sum of its proper divisors (191677528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131097512 is a wasteful number, since it uses less digits than its factorization.

131097512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 131097512 is about 11449.7821813343. The cubic root of 131097512 is about 508.0012916660.

The spelling of 131097512 in words is "one hundred thirty-one million, ninety-seven thousand, five hundred twelve".

Divisors: 1 2 4 7 8 13 14 26 28 31 37 52 56 62 74 91 104 124 148 157 182 217 248 259 296 314 364 403 434 481 518 628 728 806 868 962 1036 1099 1147 1256 1612 1736 1924 2041 2072 2198 2294 2821 3224 3367 3848 4082 4396 4588 4867 5642 5809 6734 8029 8164 8792 9176 9734 11284 11618 13468 14287 14911 16058 16328 19468 22568 23236 26936 28574 29822 32116 34069 38936 40663 46472 57148 59644 63271 64232 68138 75517 81326 104377 114296 119288 126542 136276 151034 162652 180079 208754 253084 272552 302068 325304 360158 417508 442897 506168 528619 604136 720316 835016 885794 1057238 1260553 1440632 1771588 2114476 2341027 2521106 3543176 4228952 4682054 5042212 9364108 10084424 16387189 18728216 32774378 65548756 131097512