56221237 has 4 divisors (see below), whose sum is σ = 56267500. Its totient is φ = 56174976.

The previous prime is 56221213. The next prime is 56221273. The reversal of 56221237 is 73212265.

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 9790641 + 46430596 = 3129^2 + 6814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56221237 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 (56221037) 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, 21258 + ... + 23755.

It is an arithmetic number, because the mean of its divisors is an integer number (14066875).

Almost surely, 2^56221237 is an apocalyptic number.

It is an amenable number.

56221237 is a deficient number, since it is larger than the sum of its proper divisors (46263).

56221237 is a wasteful number, since it uses less digits than its factorization.

56221237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46262.

The product of its digits is 5040, while the sum is 28.

The square root of 56221237 is about 7498.0822214750. The cubic root of 56221237 is about 383.0893973341.

It can be divided in two parts, 5622 and 1237, that added together give a cube (6859 = 19³).

The spelling of 56221237 in words is "fifty-six million, two hundred twenty-one thousand, two hundred thirty-seven".