51356684 has 12 divisors (see below), whose sum is σ = 90196008. Its totient is φ = 25586400.

The previous prime is 51356633. The next prime is 51356687. The reversal of 51356684 is 48665315.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (51356687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21722 + ... + 23969.

It is an arithmetic number, because the mean of its divisors is an integer number (7516334).

Almost surely, 2^51356684 is an apocalyptic number.

It is an amenable number.

51356684 is a deficient number, since it is larger than the sum of its proper divisors (38839324).

51356684 is a wasteful number, since it uses less digits than its factorization.

51356684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45976 (or 45974 counting only the distinct ones).

The product of its digits is 86400, while the sum is 38.

The square root of 51356684 is about 7166.3577917935. The cubic root of 51356684 is about 371.7055036154.

The spelling of 51356684 in words is "fifty-one million, three hundred fifty-six thousand, six hundred eighty-four".