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131423195 = 5181145219
BaseRepresentation
bin1111101010101…
…01101111011011
3100011021222201202
413311111233123
5232121020240
621012504415
73154036001
oct765255733
9304258652
10131423195
1168204212
123801b10b
13212c6507
1413650a71
15b810315
hex7d55bdb

131423195 has 8 divisors (see below), whose sum is σ = 158580240. Its totient is φ = 104556960.

The previous prime is 131423189. The next prime is 131423197. The reversal of 131423195 is 591324131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131423195 - 28 = 131422939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131423197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71705 + ... + 73514.

It is an arithmetic number, because the mean of its divisors is an integer number (19822530).

Almost surely, 2131423195 is an apocalyptic number.

131423195 is a deficient number, since it is larger than the sum of its proper divisors (27157045).

131423195 is a wasteful number, since it uses less digits than its factorization.

131423195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145405.

The product of its digits is 3240, while the sum is 29.

The square root of 131423195 is about 11463.9955949049. The cubic root of 131423195 is about 508.4216163668.

The spelling of 131423195 in words is "one hundred thirty-one million, four hundred twenty-three thousand, one hundred ninety-five".

Divisors: 1 5 181 905 145219 726095 26284639 131423195