51856908 has 24 divisors (see below), whose sum is σ = 122133312. Its totient is φ = 17123664.

The previous prime is 51856907. The next prime is 51856913. The reversal of 51856908 is 80965815.

It is a self number, because there is not a number n which added to its sum of digits gives 51856908.

It is not an unprimeable number, because it can be changed into a prime (51856907) 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 7 ways as a sum of consecutive naturals, for example, 18910 + ... + 21477.

It is an arithmetic number, because the mean of its divisors is an integer number (5088888).

Almost surely, 2^51856908 is an apocalyptic number.

It is an amenable number.

51856908 is an abundant number, since it is smaller than the sum of its proper divisors (70276404).

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

51856908 is a wasteful number, since it uses less digits than its factorization.

51856908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40501 (or 40499 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 51856908 is about 7201.1740709415. The cubic root of 51856908 is about 372.9084341840.

The spelling of 51856908 in words is "fifty-one million, eight hundred fifty-six thousand, nine hundred eight".