56501237 has 4 divisors (see below), whose sum is σ = 60847500. Its totient is φ = 52154976.

The previous prime is 56501227. The next prime is 56501261. The reversal of 56501237 is 73210565.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12292036 + 44209201 = 3506^2 + 6649^2 .

It is a cyclic number.

It is not a de Polignac number, because 56501237 - 2²⁴ = 39724021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56501227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2173112 + ... + 2173137.

It is an arithmetic number, because the mean of its divisors is an integer number (15211875).

Almost surely, 2^56501237 is an apocalyptic number.

It is an amenable number.

56501237 is a deficient number, since it is larger than the sum of its proper divisors (4346263).

56501237 is a wasteful number, since it uses less digits than its factorization.

56501237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4346262.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 56501237 is about 7516.7304727521. The cubic root of 56501237 is about 383.7243142948.

The spelling of 56501237 in words is "fifty-six million, five hundred one thousand, two hundred thirty-seven".