51065868 has 48 divisors (see below), whose sum is σ = 140878080. Its totient is φ = 14086464.

The previous prime is 51065851. The next prime is 51065879. The reversal of 51065868 is 86856015.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8046 + ... + 12917.

It is an arithmetic number, because the mean of its divisors is an integer number (2934960).

Almost surely, 2^51065868 is an apocalyptic number.

51065868 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

51065868 is an abundant number, since it is smaller than the sum of its proper divisors (89812212).

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

51065868 is a wasteful number, since it uses less digits than its factorization.

51065868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21006 (or 21004 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 51065868 is about 7146.0386229015. The cubic root of 51065868 is about 371.0025597816.

The spelling of 51065868 in words is "fifty-one million, sixty-five thousand, eight hundred sixty-eight".