56633251 has 4 divisors (see below), whose sum is σ = 56671272. Its totient is φ = 56595232.

The previous prime is 56633233. The next prime is 56633257. The reversal of 56633251 is 15233665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15233665 = 5 ⋅3046733.

It is a cyclic number.

It is not a de Polignac number, because 56633251 - 2⁷ = 56633123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56633257) 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, 16681 + ... + 19786.

It is an arithmetic number, because the mean of its divisors is an integer number (14167818).

Almost surely, 2^56633251 is an apocalyptic number.

56633251 is a deficient number, since it is larger than the sum of its proper divisors (38021).

56633251 is a wasteful number, since it uses less digits than its factorization.

56633251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38020.

The product of its digits is 16200, while the sum is 31.

The square root of 56633251 is about 7525.5066939044. The cubic root of 56633251 is about 384.0229365459.

The spelling of 56633251 in words is "fifty-six million, six hundred thirty-three thousand, two hundred fifty-one".