56751257 has 8 divisors (see below), whose sum is σ = 58447872. Its totient is φ = 55069600.

The previous prime is 56751251. The next prime is 56751259. The reversal of 56751257 is 75215765.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56751257 - 2¹² = 56747161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56751257.

It is not an unprimeable number, because it can be changed into a prime (56751251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4208 + ... + 11454.

It is an arithmetic number, because the mean of its divisors is an integer number (7305984).

Almost surely, 2^56751257 is an apocalyptic number.

It is an amenable number.

56751257 is a deficient number, since it is larger than the sum of its proper divisors (1696615).

56751257 is a wasteful number, since it uses less digits than its factorization.

56751257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7479.

The product of its digits is 73500, while the sum is 38.

The square root of 56751257 is about 7533.3430162180. The cubic root of 56751257 is about 384.2894794380.

The spelling of 56751257 in words is "fifty-six million, seven hundred fifty-one thousand, two hundred fifty-seven".