51313866 has 16 divisors (see below), whose sum is σ = 105938688. Its totient is φ = 16552800.

The previous prime is 51313853. The next prime is 51313891. The reversal of 51313866 is 66831315.

It is a super-2 number, since 2×51313866² = 5266225687731912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137755 + ... + 138126.

It is an arithmetic number, because the mean of its divisors is an integer number (6621168).

Almost surely, 2^51313866 is an apocalyptic number.

51313866 is an abundant number, since it is smaller than the sum of its proper divisors (54624822).

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

51313866 is a wasteful number, since it uses less digits than its factorization.

51313866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275917.

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

The square root of 51313866 is about 7163.3697377701. The cubic root of 51313866 is about 371.6021732714.

The spelling of 51313866 in words is "fifty-one million, three hundred thirteen thousand, eight hundred sixty-six".