56633551 has 4 divisors (see below), whose sum is σ = 60989992. Its totient is φ = 52277112.

The previous prime is 56633539. The next prime is 56633561. The reversal of 56633551 is 15533665.

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

It is a cyclic number.

It is not a de Polignac number, because 56633551 - 2⁵ = 56633519 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 (56633501) 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, 2178201 + ... + 2178226.

It is an arithmetic number, because the mean of its divisors is an integer number (15247498).

Almost surely, 2^56633551 is an apocalyptic number.

56633551 is a deficient number, since it is larger than the sum of its proper divisors (4356441).

56633551 is a wasteful number, since it uses less digits than its factorization.

56633551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4356440.

The product of its digits is 40500, while the sum is 34.

The square root of 56633551 is about 7525.5266260907. The cubic root of 56633551 is about 384.0236146321.

The spelling of 56633551 in words is "fifty-six million, six hundred thirty-three thousand, five hundred fifty-one".