157597631 has 2 divisors, whose sum is σ = 157597632. Its totient is φ = 157597630.

The previous prime is 157597619. The next prime is 157597639. The reversal of 157597631 is 136795751.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157597631 is a prime.

It is a super-2 number, since 2×157597631² = 49674026593624322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157597639) 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 as a sum of consecutive naturals, namely, 78798815 + 78798816.

It is an arithmetic number, because the mean of its divisors is an integer number (78798816).

Almost surely, 2^157597631 is an apocalyptic number.

157597631 is a deficient number, since it is larger than the sum of its proper divisors (1).

157597631 is an equidigital number, since it uses as much as digits as its factorization.

157597631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 198450, while the sum is 44.

The square root of 157597631 is about 12553.7895075551. The cubic root of 157597631 is about 540.1527128670.

The spelling of 157597631 in words is "one hundred fifty-seven million, five hundred ninety-seven thousand, six hundred thirty-one".