157508131 has 4 divisors (see below), whose sum is σ = 171827064. Its totient is φ = 143189200.

The previous prime is 157508129. The next prime is 157508137. The reversal of 157508131 is 131805751.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 157508131 - 2¹ = 157508129 is a prime.

It is a super-2 number, since 2×157508131² = 49617622662226322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157508093 and 157508102.

It is not an unprimeable number, because it can be changed into a prime (157508137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7159450 + ... + 7159471.

It is an arithmetic number, because the mean of its divisors is an integer number (42956766).

Almost surely, 2^157508131 is an apocalyptic number.

157508131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

157508131 is a deficient number, since it is larger than the sum of its proper divisors (14318933).

157508131 is a wasteful number, since it uses less digits than its factorization.

157508131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14318932.

The product of its (nonzero) digits is 4200, while the sum is 31.

The square root of 157508131 is about 12550.2243406244. The cubic root of 157508131 is about 540.0504422473.

The spelling of 157508131 in words is "one hundred fifty-seven million, five hundred eight thousand, one hundred thirty-one".