56542551 has 32 divisors (see below), whose sum is σ = 83973120. Its totient is φ = 33623424.

The previous prime is 56542531. The next prime is 56542553. The reversal of 56542551 is 15524565.

It is not a de Polignac number, because 56542551 - 2²¹ = 54445399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56542553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199656 + ... + 199938.

It is an arithmetic number, because the mean of its divisors is an integer number (2624160).

Almost surely, 2^56542551 is an apocalyptic number.

56542551 is a deficient number, since it is larger than the sum of its proper divisors (27430569).

56542551 is a wasteful number, since it uses less digits than its factorization.

56542551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455.

The product of its digits is 30000, while the sum is 33.

The square root of 56542551 is about 7519.4781068901. The cubic root of 56542551 is about 383.8178185834.

The spelling of 56542551 in words is "fifty-six million, five hundred forty-two thousand, five hundred fifty-one".