51818684 has 12 divisors (see below), whose sum is σ = 90733104. Its totient is φ = 25894944.

The previous prime is 51818677. The next prime is 51818687. The reversal of 51818684 is 48681815.

51818684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51818684² = 5370352022983712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51818687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12272 + ... + 15944.

It is an arithmetic number, because the mean of its divisors is an integer number (7561092).

Almost surely, 2^51818684 is an apocalyptic number.

It is an amenable number.

51818684 is a deficient number, since it is larger than the sum of its proper divisors (38914420).

51818684 is a wasteful number, since it uses less digits than its factorization.

51818684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7204 (or 7202 counting only the distinct ones).

The product of its digits is 61440, while the sum is 41.

The square root of 51818684 is about 7198.5195700227. The cubic root of 51818684 is about 372.8167874055.

The spelling of 51818684 in words is "fifty-one million, eight hundred eighteen thousand, six hundred eighty-four".