51173857555315 has 32 divisors (see below), whose sum is σ = 67425991796160. Its totient is φ = 36975874291200.

The previous prime is 51173857555229. The next prime is 51173857555319. The reversal of 51173857555315 is 51355575837115.

It is not a de Polignac number, because 51173857555315 - 2²¹ = 51173855458163 is a prime.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (51173857555319) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72710521 + ... + 73410949.

It is an arithmetic number, because the mean of its divisors is an integer number (2107062243630).

Almost surely, 2^{51173857555315} is an apocalyptic number.

51173857555315 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51173857555315 is a deficient number, since it is larger than the sum of its proper divisors (16252134240845).

51173857555315 is a wasteful number, since it uses less digits than its factorization.

51173857555315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709063.

The product of its digits is 55125000, while the sum is 61.

The spelling of 51173857555315 in words is "fifty-one trillion, one hundred seventy-three billion, eight hundred fifty-seven million, five hundred fifty-five thousand, three hundred fifteen".