56533251 has 4 divisors (see below), whose sum is σ = 75377672. Its totient is φ = 37688832.

The previous prime is 56533237. The next prime is 56533259. The reversal of 56533251 is 15233565.

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

It is not a de Polignac number, because 56533251 - 2¹⁰ = 56532227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56533259) 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, 9422206 + ... + 9422211.

It is an arithmetic number, because the mean of its divisors is an integer number (18844418).

Almost surely, 2^56533251 is an apocalyptic number.

56533251 is a deficient number, since it is larger than the sum of its proper divisors (18844421).

56533251 is a wasteful number, since it uses less digits than its factorization.

56533251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18844420.

The product of its digits is 13500, while the sum is 30.

The square root of 56533251 is about 7518.8596874792. The cubic root of 56533251 is about 383.7967742467.

The spelling of 56533251 in words is "fifty-six million, five hundred thirty-three thousand, two hundred fifty-one".