51718812 has 24 divisors (see below), whose sum is σ = 125924736. Its totient is φ = 16489968.

The previous prime is 51718787. The next prime is 51718813. The reversal of 51718812 is 21881715.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51718813) 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, 93418 + ... + 93969.

It is an arithmetic number, because the mean of its divisors is an integer number (5246864).

Almost surely, 2^51718812 is an apocalyptic number.

It is an amenable number.

51718812 is an abundant number, since it is smaller than the sum of its proper divisors (74205924).

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

51718812 is a wasteful number, since it uses less digits than its factorization.

51718812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187417 (or 187415 counting only the distinct ones).

The product of its digits is 4480, while the sum is 33.

The square root of 51718812 is about 7191.5792424196. The cubic root of 51718812 is about 372.5771189968.

The spelling of 51718812 in words is "fifty-one million, seven hundred eighteen thousand, eight hundred twelve".