51515352032 has 24 divisors (see below), whose sum is σ = 101459887200. Its totient is φ = 25747761664.

The previous prime is 51515352029. The next prime is 51515352067. The reversal of 51515352032 is 23025351515.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 51515352032.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225032 + ... + 392007.

It is an arithmetic number, because the mean of its divisors is an integer number (4227495300).

Almost surely, 2^51515352032 is an apocalyptic number.

It is an amenable number.

51515352032 is a deficient number, since it is larger than the sum of its proper divisors (49944535168).

51515352032 is a wasteful number, since it uses less digits than its factorization.

51515352032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619658 (or 619650 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 32.

The spelling of 51515352032 in words is "fifty-one billion, five hundred fifteen million, three hundred fifty-two thousand, thirty-two".