2651317631 has 4 divisors (see below), whose sum is σ = 2654426712. Its totient is φ = 2648208552.

The previous prime is 2651317597. The next prime is 2651317639. The reversal of 2651317631 is 1367131562.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2651317631 is a prime.

It is a super-2 number, since 2×2651317631² = 14058970360902904322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2651317591 and 2651317600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2651317639) 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, 1553261 + ... + 1554966.

It is an arithmetic number, because the mean of its divisors is an integer number (663606678).

Almost surely, 2^2651317631 is an apocalyptic number.

2651317631 is a deficient number, since it is larger than the sum of its proper divisors (3109081).

2651317631 is an equidigital number, since it uses as much as digits as its factorization.

2651317631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3109080.

The product of its digits is 22680, while the sum is 35.

The square root of 2651317631 is about 51490.9470781030. The cubic root of 2651317631 is about 1384.0568208640.

It can be divided in two parts, 26513 and 17631, that added together give a palindrome (44144).

The spelling of 2651317631 in words is "two billion, six hundred fifty-one million, three hundred seventeen thousand, six hundred thirty-one".