2631125813 has 4 divisors (see below), whose sum is σ = 2662826208. Its totient is φ = 2599425420.

The previous prime is 2631125803. The next prime is 2631125863. The reversal of 2631125813 is 3185211362.

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 not a de Polignac number, because 2631125813 - 2²⁰ = 2630077237 is a prime.

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 2631125813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2631125803) 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, 15850073 + ... + 15850238.

It is an arithmetic number, because the mean of its divisors is an integer number (665706552).

Almost surely, 2^2631125813 is an apocalyptic number.

It is an amenable number.

2631125813 is a deficient number, since it is larger than the sum of its proper divisors (31700395).

2631125813 is an equidigital number, since it uses as much as digits as its factorization.

2631125813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31700394.

The product of its digits is 8640, while the sum is 32.

The square root of 2631125813 is about 51294.5008066167. The cubic root of 2631125813 is about 1380.5343119306.

The spelling of 2631125813 in words is "two billion, six hundred thirty-one million, one hundred twenty-five thousand, eight hundred thirteen".