51918936 has 16 divisors (see below), whose sum is σ = 129797400. Its totient is φ = 17306304.

The previous prime is 51918917. The next prime is 51918967. The reversal of 51918936 is 63981915.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1081621 + ... + 1081668.

Almost surely, 2^51918936 is an apocalyptic number.

It is an amenable number.

51918936 is an abundant number, since it is smaller than the sum of its proper divisors (77878464).

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

51918936 is a wasteful number, since it uses less digits than its factorization.

51918936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163298 (or 2163294 counting only the distinct ones).

The product of its digits is 58320, while the sum is 42.

The square root of 51918936 is about 7205.4795815407. The cubic root of 51918936 is about 373.0570582140.

The spelling of 51918936 in words is "fifty-one million, nine hundred eighteen thousand, nine hundred thirty-six".