157615631 has 4 divisors (see below), whose sum is σ = 157672200. Its totient is φ = 157559064.

The previous prime is 157615567. The next prime is 157615639. The reversal of 157615631 is 136516751.

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

It is a cyclic number.

It is not a de Polignac number, because 157615631 - 2⁶ = 157615567 is a prime.

It is a super-2 number, since 2×157615631² = 49685374271056322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157615591 and 157615600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157615639) 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, 23876 + ... + 29753.

It is an arithmetic number, because the mean of its divisors is an integer number (39418050).

Almost surely, 2^157615631 is an apocalyptic number.

157615631 is a deficient number, since it is larger than the sum of its proper divisors (56569).

157615631 is an equidigital number, since it uses as much as digits as its factorization.

157615631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56568.

The product of its digits is 18900, while the sum is 35.

The square root of 157615631 is about 12554.5064020853. The cubic root of 157615631 is about 540.1732765828.

The spelling of 157615631 in words is "one hundred fifty-seven million, six hundred fifteen thousand, six hundred thirty-one".