2531318660 has 48 divisors (see below), whose sum is σ = 5730942000. Its totient is φ = 933617664.

The previous prime is 2531318653. The next prime is 2531318747. The reversal of 2531318660 is 668131352.

It can be written as a sum of positive squares in 8 ways, for example, as 787588096 + 1743730564 = 28064^2 + 41758^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2531318660.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257516 + ... + 267164.

It is an arithmetic number, because the mean of its divisors is an integer number (119394625).

Almost surely, 2^2531318660 is an apocalyptic number.

2531318660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2531318660 is an abundant number, since it is smaller than the sum of its proper divisors (3199623340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2531318660 is a wasteful number, since it uses less digits than its factorization.

2531318660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10680 (or 10678 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 2531318660 is about 50312.2118376841. The cubic root of 2531318660 is about 1362.8527668337.

The spelling of 2531318660 in words is "two billion, five hundred thirty-one million, three hundred eighteen thousand, six hundred sixty".