51105020514155 has 16 divisors (see below), whose sum is σ = 63443621325600. Its totient is φ = 39472414437120.

The previous prime is 51105020514109. The next prime is 51105020514179. The reversal of 51105020514155 is 55141502050115.

It is a de Polignac number, because none of the positive numbers 2^k-51105020514155 is a prime.

It is a super-2 number, since 2×51105020514155² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4892306 + ... + 11231415.

It is an arithmetic number, because the mean of its divisors is an integer number (3965226332850).

Almost surely, 2^{51105020514155} is an apocalyptic number.

51105020514155 is a deficient number, since it is larger than the sum of its proper divisors (12338600811445).

51105020514155 is a wasteful number, since it uses less digits than its factorization.

51105020514155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16145614.

The product of its (nonzero) digits is 25000, while the sum is 35.

The spelling of 51105020514155 in words is "fifty-one trillion, one hundred five billion, twenty million, five hundred fourteen thousand, one hundred fifty-five".