51456400232 has 32 divisors (see below), whose sum is σ = 99497349000. Its totient is φ = 24932198400.

The previous prime is 51456400223. The next prime is 51456400279. The reversal of 51456400232 is 23200465415.

It can be written as a sum of positive squares in 4 ways, for example, as 4448089636 + 47008310596 = 66694^2 + 216814^2 .

It is a super-2 number, since 2×51456400232² (a number of 22 digits) contains 22 as substring.

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, 477569 + ... + 575312.

Almost surely, 2^51456400232 is an apocalyptic number.

It is an amenable number.

51456400232 is a deficient number, since it is larger than the sum of its proper divisors (48040948768).

51456400232 is a wasteful number, since it uses less digits than its factorization.

51456400232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053077 (or 1053073 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 51456400232 its reverse (23200465415), we get a palindrome (74656865647).

The spelling of 51456400232 in words is "fifty-one billion, four hundred fifty-six million, four hundred thousand, two hundred thirty-two".