51313568 has 24 divisors (see below), whose sum is σ = 101314080. Its totient is φ = 25583040.

The previous prime is 51313553. The next prime is 51313571. The reversal of 51313568 is 86531315.

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 10013 + ... + 14243.

It is an arithmetic number, because the mean of its divisors is an integer number (4221420).

Almost surely, 2^51313568 is an apocalyptic number.

It is an amenable number.

51313568 is a deficient number, since it is larger than the sum of its proper divisors (50000512).

51313568 is a wasteful number, since it uses less digits than its factorization.

51313568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4620 (or 4612 counting only the distinct ones).

The product of its digits is 10800, while the sum is 32.

The square root of 51313568 is about 7163.3489374733. The cubic root of 51313568 is about 371.6014539229.

The spelling of 51313568 in words is "fifty-one million, three hundred thirteen thousand, five hundred sixty-eight".