51508656 has 40 divisors (see below), whose sum is σ = 147850160. Its totient is φ = 17169408.

The previous prime is 51508631. The next prime is 51508679. The reversal of 51508656 is 65680515.

51508656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51508656.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 59185 + ... + 60048.

It is an arithmetic number, because the mean of its divisors is an integer number (3696254).

Almost surely, 2^51508656 is an apocalyptic number.

It is an amenable number.

51508656 is an abundant number, since it is smaller than the sum of its proper divisors (96341504).

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

51508656 is a wasteful number, since it uses less digits than its factorization.

51508656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119250 (or 119238 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 51508656 is about 7176.9531139614. The cubic root of 51508656 is about 372.0717863543.

The spelling of 51508656 in words is "fifty-one million, five hundred eight thousand, six hundred fifty-six".