51900516 has 18 divisors (see below), whose sum is σ = 131193062. Its totient is φ = 17300160.

The previous prime is 51900467. The next prime is 51900521. The reversal of 51900516 is 61500915.

51900516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 51840000 + 60516 = 7200^2 + 246^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×51900516² = 5387327122132512, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51900516.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 720805 + ... + 720876.

Almost surely, 2^51900516 is an apocalyptic number.

It is an amenable number.

51900516 is an abundant number, since it is smaller than the sum of its proper divisors (79292546).

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

51900516 is a wasteful number, since it uses less digits than its factorization.

51900516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441691 (or 1441686 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

The square root of 51900516 is about 7204.2012742566. The cubic root of 51900516 is about 373.0129347890.

The spelling of 51900516 in words is "fifty-one million, nine hundred thousand, five hundred sixteen".