51900224136 has 128 divisors (see below), whose sum is σ = 142120396800. Its totient is φ = 15737829120.

The previous prime is 51900224111. The next prime is 51900224213. The reversal of 51900224136 is 63142200915.

It is a junction number, because it is equal to n+sod(n) for n = 51900224097 and 51900224106.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1113051 + ... + 1158741.

It is an arithmetic number, because the mean of its divisors is an integer number (1110315600).

Almost surely, 2^51900224136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51900224136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71060198400).

51900224136 is an abundant number, since it is smaller than the sum of its proper divisors (90220172664).

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

51900224136 is a wasteful number, since it uses less digits than its factorization.

51900224136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45819 (or 45815 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 51900224136 in words is "fifty-one billion, nine hundred million, two hundred twenty-four thousand, one hundred thirty-six".