157201631 has 8 divisors (see below), whose sum is σ = 161738544. Its totient is φ = 152729280.

The previous prime is 157201621. The next prime is 157201637. The reversal of 157201631 is 136102751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157201631 is a prime.

It is a super-2 number, since 2×157201631² = 49424705578120322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157201631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157201637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11180 + ... + 20961.

It is an arithmetic number, because the mean of its divisors is an integer number (20217318).

Almost surely, 2^157201631 is an apocalyptic number.

157201631 is a deficient number, since it is larger than the sum of its proper divisors (4536913).

157201631 is an equidigital number, since it uses as much as digits as its factorization.

157201631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32281.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 157201631 is about 12538.0074573275. The cubic root of 157201631 is about 539.6999144305.

The spelling of 157201631 in words is "one hundred fifty-seven million, two hundred one thousand, six hundred thirty-one".