51056531315550 has 36 divisors (see below), whose sum is σ = 137171880802320. Its totient is φ = 13615075017360.

The previous prime is 51056531315521. The next prime is 51056531315563. The reversal of 51056531315550 is 5551313565015.

51056531315550 is a `hidden beast` number, since 5 + 1 + 0 + 5 + 65 + 3 + 1 + 31 + 5 + 550 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 51056531315496 and 51056531315505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 56729478790 + ... + 56729479689.

Almost surely, 2^{51056531315550} is an apocalyptic number.

51056531315550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51056531315550 is an abundant number, since it is smaller than the sum of its proper divisors (86115349486770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51056531315550 is a wasteful number, since it uses less digits than its factorization.

51056531315550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113458958497 (or 113458958489 counting only the distinct ones).

The product of its (nonzero) digits is 843750, while the sum is 45.

The spelling of 51056531315550 in words is "fifty-one trillion, fifty-six billion, five hundred thirty-one million, three hundred fifteen thousand, five hundred fifty".