51856468 has 6 divisors (see below), whose sum is σ = 90748826. Its totient is φ = 25928232.

The previous prime is 51856447. The next prime is 51856471. The reversal of 51856468 is 86465815.

It can be written as a sum of positive squares in only one way, i.e., 49730704 + 2125764 = 7052^2 + 1458^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 6482055 + ... + 6482062.

Almost surely, 2^51856468 is an apocalyptic number.

It is an amenable number.

51856468 is a deficient number, since it is larger than the sum of its proper divisors (38892358).

51856468 is a wasteful number, since it uses less digits than its factorization.

51856468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12964121 (or 12964119 counting only the distinct ones).

The product of its digits is 230400, while the sum is 43.

The square root of 51856468 is about 7201.1435203029. The cubic root of 51856468 is about 372.9073794857.

The spelling of 51856468 in words is "fifty-one million, eight hundred fifty-six thousand, four hundred sixty-eight".