56550531 has 4 divisors (see below), whose sum is σ = 75400712. Its totient is φ = 37700352.

The previous prime is 56550499. The next prime is 56550553. The reversal of 56550531 is 13505565.

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

It is not a de Polignac number, because 56550531 - 2⁵ = 56550499 is a prime.

It is a super-2 number, since 2×56550531² = 6395925112763922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56550331) 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, 9425086 + ... + 9425091.

It is an arithmetic number, because the mean of its divisors is an integer number (18850178).

Almost surely, 2^56550531 is an apocalyptic number.

56550531 is a deficient number, since it is larger than the sum of its proper divisors (18850181).

56550531 is a wasteful number, since it uses less digits than its factorization.

56550531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18850180.

The product of its (nonzero) digits is 11250, while the sum is 30.

The square root of 56550531 is about 7520.0087101013. The cubic root of 56550531 is about 383.8358741425.

The spelling of 56550531 in words is "fifty-six million, five hundred fifty thousand, five hundred thirty-one".