2256515631 has 16 divisors (see below), whose sum is σ = 3385305600. Its totient is φ = 1485300024.

The previous prime is 2256515623. The next prime is 2256515659. The reversal of 2256515631 is 1365156522.

2256515631 is a `hidden beast` number, since 2 + 2 + 5 + 6 + 5 + 15 + 631 = 666.

It is not a de Polignac number, because 2256515631 - 2³ = 2256515623 is a prime.

It is a super-2 number, since 2×2256515631² = 10183725585894656322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256515231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 526821 + ... + 531086.

It is an arithmetic number, because the mean of its divisors is an integer number (211581600).

Almost surely, 2^2256515631 is an apocalyptic number.

2256515631 is a deficient number, since it is larger than the sum of its proper divisors (1128789969).

2256515631 is a wasteful number, since it uses less digits than its factorization.

2256515631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057995 (or 1057989 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 2256515631 is about 47502.7960334968. The cubic root of 2256515631 is about 1311.6343509895.

The spelling of 2256515631 in words is "two billion, two hundred fifty-six million, five hundred fifteen thousand, six hundred thirty-one".