157537631 has 4 divisors (see below), whose sum is σ = 157580064. Its totient is φ = 157495200.

The previous prime is 157537579. The next prime is 157537637. The reversal of 157537631 is 136735751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136735751 = 7907 ⋅17293.

It is a cyclic number.

It is not a de Polignac number, because 157537631 - 2¹⁰ = 157536607 is a prime.

It is a super-2 number, since 2×157537631² = 49636210362184322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157537637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15050 + ... + 23271.

It is an arithmetic number, because the mean of its divisors is an integer number (39395016).

Almost surely, 2^157537631 is an apocalyptic number.

157537631 is a deficient number, since it is larger than the sum of its proper divisors (42433).

157537631 is an equidigital number, since it uses as much as digits as its factorization.

157537631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42432.

The product of its digits is 66150, while the sum is 38.

The square root of 157537631 is about 12551.3995633953. The cubic root of 157537631 is about 540.0841558370.

The spelling of 157537631 in words is "one hundred fifty-seven million, five hundred thirty-seven thousand, six hundred thirty-one".