51100515502320 has 80 divisors (see below), whose sum is σ = 158520622950432. Its totient is φ = 13617425648640.

The previous prime is 51100515502189. The next prime is 51100515502327. The reversal of 51100515502320 is 2320551500115.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×51100515502320² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51100515502327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72919971 + ... + 73617410.

Almost surely, 2^{51100515502320} is an apocalyptic number.

It is an amenable number.

51100515502320 is an abundant number, since it is smaller than the sum of its proper divisors (107420107448112).

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

51100515502320 is a wasteful number, since it uses less digits than its factorization.

51100515502320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146538850 (or 146538844 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 30.

The spelling of 51100515502320 in words is "fifty-one trillion, one hundred billion, five hundred fifteen million, five hundred two thousand, three hundred twenty".