51656562 has 32 divisors (see below), whose sum is σ = 115056000. Its totient is φ = 17179344.

The previous prime is 51656543. The next prime is 51656593. The reversal of 51656562 is 26565615.

It is a happy number.

51656562 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 31548 + ... + 33144.

It is an arithmetic number, because the mean of its divisors is an integer number (3595500).

Almost surely, 2^51656562 is an apocalyptic number.

51656562 is the 3594-th decagonal number.

51656562 is an abundant number, since it is smaller than the sum of its proper divisors (63399438).

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

51656562 is a wasteful number, since it uses less digits than its factorization.

51656562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207 (or 2201 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 51656562 is about 7187.2499608682. The cubic root of 51656562 is about 372.4275780711.

The spelling of 51656562 in words is "fifty-one million, six hundred fifty-six thousand, five hundred sixty-two".