51697581032 has 16 divisors (see below), whose sum is σ = 100275480900. Its totient is φ = 24957452800.

The previous prime is 51697581031. The next prime is 51697581037. The reversal of 51697581032 is 23018579615.

51697581032 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 47792080996 + 3905500036 = 218614^2 + 62494^2 .

It is not an unprimeable number, because it can be changed into a prime (51697581031) 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, 111416969 + ... + 111417432.

Almost surely, 2^51697581032 is an apocalyptic number.

It is an amenable number.

51697581032 is a deficient number, since it is larger than the sum of its proper divisors (48577899868).

51697581032 is a wasteful number, since it uses less digits than its factorization.

51697581032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222834436 (or 222834432 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 47.

The spelling of 51697581032 in words is "fifty-one billion, six hundred ninety-seven million, five hundred eighty-one thousand, thirty-two".