551431656532 has 24 divisors (see below), whose sum is σ = 1007115820200. Its totient is φ = 263852553216.

The previous prime is 551431656493. The next prime is 551431656551. The reversal of 551431656532 is 235656134155.

It can be written as a sum of positive squares in 4 ways, for example, as 57453213636 + 493978442896 = 239694^2 + 702836^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21021057 + ... + 21047272.

It is an arithmetic number, because the mean of its divisors is an integer number (41963159175).

Almost surely, 2^551431656532 is an apocalyptic number.

It is an amenable number.

551431656532 is a deficient number, since it is larger than the sum of its proper divisors (455684163668).

551431656532 is a wasteful number, since it uses less digits than its factorization.

551431656532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42068475 (or 42068473 counting only the distinct ones).

The product of its digits is 1620000, while the sum is 46.

The spelling of 551431656532 in words is "five hundred fifty-one billion, four hundred thirty-one million, six hundred fifty-six thousand, five hundred thirty-two".