157506831 has 12 divisors (see below), whose sum is σ = 231803208. Its totient is φ = 103023024.

The previous prime is 157506821. The next prime is 157506847. The reversal of 157506831 is 138605751.

157506831 is a `hidden beast` number, since 1 + 575 + 0 + 6 + 83 + 1 = 666.

It is not a de Polignac number, because 157506831 - 2⁷ = 157506703 is a prime.

It is a super-2 number, since 2×157506831² = 49616803623325122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157506821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164625 + ... + 165578.

It is an arithmetic number, because the mean of its divisors is an integer number (19316934).

Almost surely, 2^157506831 is an apocalyptic number.

157506831 is a deficient number, since it is larger than the sum of its proper divisors (74296377).

157506831 is a wasteful number, since it uses less digits than its factorization.

157506831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330262 (or 330259 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 157506831 is about 12550.1725486146. The cubic root of 157506831 is about 540.0489564668.

The spelling of 157506831 in words is "one hundred fifty-seven million, five hundred six thousand, eight hundred thirty-one".