3131910157 has 4 divisors (see below), whose sum is σ = 3184993440. Its totient is φ = 3078826876.

The previous prime is 3131910139. The next prime is 3131910179. The reversal of 3131910157 is 7510191313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3131910157 is a prime.

It is a super-2 number, since 2×3131910157² = 19617722463039529298, 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 (3131910107) 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, 26541553 + ... + 26541670.

It is an arithmetic number, because the mean of its divisors is an integer number (796248360).

Almost surely, 2^3131910157 is an apocalyptic number.

It is an amenable number.

3131910157 is a deficient number, since it is larger than the sum of its proper divisors (53083283).

3131910157 is an equidigital number, since it uses as much as digits as its factorization.

3131910157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53083282.

The product of its (nonzero) digits is 2835, while the sum is 31.

The square root of 3131910157 is about 55963.4716310559. The cubic root of 3131910157 is about 1463.0856982707.

The spelling of 3131910157 in words is "three billion, one hundred thirty-one million, nine hundred ten thousand, one hundred fifty-seven".