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131022852608 = 291729412
BaseRepresentation
bin111101000000110010…
…0100001001000000000
3110112012012121112121202
41322001210201020000
54121313322240413
6140105134240332
712315603604634
oct1720144411000
9415165545552
10131022852608
1150625a9146a
12214873560a8
13c480a8366b
1464ad284dc4
15361ca5ae58
hex1e81921200

131022852608 has 90 divisors (see below), whose sum is σ = 278390893803. Its totient is φ = 61592289280.

The previous prime is 131022852607. The next prime is 131022852613. The reversal of 131022852608 is 806258220131.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 114006171904 + 17016680704 = 337648^2 + 130448^2 .

It is an ABA number since it can be written as A⋅BA, here for A=2, B=255952.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131022852601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 139237418 + ... + 139238358.

Almost surely, 2131022852608 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 131022852608

131022852608 is an abundant number, since it is smaller than the sum of its proper divisors (147368041195).

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

131022852608 is an frugal number, since it uses more digits than its factorization.

131022852608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934 (or 960 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 131022852608 in words is "one hundred thirty-one billion, twenty-two million, eight hundred fifty-two thousand, six hundred eight".

Divisors: 1 2 4 8 16 17 32 34 64 68 128 136 256 272 289 512 544 578 941 1088 1156 1882 2176 2312 3764 4352 4624 7528 8704 9248 15056 15997 18496 30112 31994 36992 60224 63988 73984 120448 127976 147968 240896 255952 271949 481792 511904 543898 885481 1023808 1087796 1770962 2047616 2175592 3541924 4095232 4351184 7083848 8190464 8702368 14167696 15053177 17404736 28335392 30106354 34809472 56670784 60212708 69618944 113341568 120425416 139237888 226683136 240850832 255904009 453366272 481701664 511808018 963403328 1023616036 1926806656 2047232072 3853613312 4094464144 7707226624 8188928288 16377856576 32755713152 65511426304 131022852608