51512255238 has 16 divisors (see below), whose sum is σ = 103028240880. Its totient is φ = 17170130016.

The previous prime is 51512255219. The next prime is 51512255239. The reversal of 51512255238 is 83255221515.

It is a junction number, because it is equal to n+sod(n) for n = 51512255196 and 51512255205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51512255239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43708 + ... + 323936.

It is an arithmetic number, because the mean of its divisors is an integer number (6439265055).

Almost surely, 2^51512255238 is an apocalyptic number.

51512255238 is an abundant number, since it is smaller than the sum of its proper divisors (51515985642).

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

51512255238 is a wasteful number, since it uses less digits than its factorization.

51512255238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310871.

The product of its digits is 120000, while the sum is 39.

The spelling of 51512255238 in words is "fifty-one billion, five hundred twelve million, two hundred fifty-five thousand, two hundred thirty-eight".