180157131 has 24 divisors (see below), whose sum is σ = 324440064. Its totient is φ = 93587760.

The previous prime is 180157129. The next prime is 180157139. The reversal of 180157131 is 131751081.

It is not a de Polignac number, because 180157131 - 2¹ = 180157129 is a prime.

It is a super-2 number, since 2×180157131² = 64913183700302322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 180157095 and 180157104.

It is not an unprimeable number, because it can be changed into a prime (180157139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129291 + ... + 130676.

It is an arithmetic number, because the mean of its divisors is an integer number (13518336).

Almost surely, 2^180157131 is an apocalyptic number.

180157131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

180157131 is a deficient number, since it is larger than the sum of its proper divisors (144282933).

180157131 is a wasteful number, since it uses less digits than its factorization.

180157131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259991 (or 259988 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 27.

The square root of 180157131 is about 13422.2625141963. The cubic root of 180157131 is about 564.7858650248.

The spelling of 180157131 in words is "one hundred eighty million, one hundred fifty-seven thousand, one hundred thirty-one".