51568568 has 16 divisors (see below), whose sum is σ = 96920880. Its totient is φ = 25723008.

The previous prime is 51568519. The next prime is 51568571. The reversal of 51568568 is 86586515.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3980 + ... + 10907.

It is an arithmetic number, because the mean of its divisors is an integer number (6057555).

Almost surely, 2^51568568 is an apocalyptic number.

It is an amenable number.

51568568 is a deficient number, since it is larger than the sum of its proper divisors (45352312).

51568568 is a wasteful number, since it uses less digits than its factorization.

51568568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15326 (or 15322 counting only the distinct ones).

The product of its digits is 288000, while the sum is 44.

The square root of 51568568 is about 7181.1258170290. The cubic root of 51568568 is about 372.2159881863.

The spelling of 51568568 in words is "fifty-one million, five hundred sixty-eight thousand, five hundred sixty-eight".