51456568 has 8 divisors (see below), whose sum is σ = 96481080. Its totient is φ = 25728280.

The previous prime is 51456563. The next prime is 51456607. The reversal of 51456568 is 86565415.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 51456568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51456563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3216028 + ... + 3216043.

It is an arithmetic number, because the mean of its divisors is an integer number (12060135).

Almost surely, 2^51456568 is an apocalyptic number.

It is an amenable number.

51456568 is a deficient number, since it is larger than the sum of its proper divisors (45024512).

51456568 is a wasteful number, since it uses less digits than its factorization.

51456568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6432077 (or 6432073 counting only the distinct ones).

The product of its digits is 144000, while the sum is 40.

The square root of 51456568 is about 7173.3233581095. The cubic root of 51456568 is about 371.9463251652.

The spelling of 51456568 in words is "fifty-one million, four hundred fifty-six thousand, five hundred sixty-eight".