51856836 has 24 divisors (see below), whose sum is σ = 121124640. Its totient is φ = 17267712.

The previous prime is 51856799. The next prime is 51856867. The reversal of 51856836 is 63865815.

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, 15375 + ... + 18441.

It is an arithmetic number, because the mean of its divisors is an integer number (5046860).

Almost surely, 2^51856836 is an apocalyptic number.

It is an amenable number.

51856836 is an abundant number, since it is smaller than the sum of its proper divisors (69267804).

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

51856836 is a wasteful number, since it uses less digits than its factorization.

51856836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4483 (or 4481 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 51856836 is about 7201.1690717549. The cubic root of 51856836 is about 372.9082615974.

It can be divided in two parts, 5185 and 6836, that added together give a palindrome (12021).

The spelling of 51856836 in words is "fifty-one million, eight hundred fifty-six thousand, eight hundred thirty-six".