2631512957 has 4 divisors (see below), whose sum is σ = 2631628896. Its totient is φ = 2631397020.

The previous prime is 2631512941. The next prime is 2631512959. The reversal of 2631512957 is 7592151362.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2631512957 - 2⁴ = 2631512941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2631512959) 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, 11513 + ... + 73454.

It is an arithmetic number, because the mean of its divisors is an integer number (657907224).

Almost surely, 2^2631512957 is an apocalyptic number.

It is an amenable number.

2631512957 is a deficient number, since it is larger than the sum of its proper divisors (115939).

2631512957 is an equidigital number, since it uses as much as digits as its factorization.

2631512957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115938.

The product of its digits is 113400, while the sum is 41.

The square root of 2631512957 is about 51298.2744056757. The cubic root of 2631512957 is about 1380.6020192420.

The spelling of 2631512957 in words is "two billion, six hundred thirty-one million, five hundred twelve thousand, nine hundred fifty-seven".