56512551 has 4 divisors (see below), whose sum is σ = 75350072. Its totient is φ = 37675032.

The previous prime is 56512549. The next prime is 56512559. The reversal of 56512551 is 15521565.

56512551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 56512551 - 2¹ = 56512549 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 (56512559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9418756 + ... + 9418761.

It is an arithmetic number, because the mean of its divisors is an integer number (18837518).

Almost surely, 2^56512551 is an apocalyptic number.

56512551 is a deficient number, since it is larger than the sum of its proper divisors (18837521).

56512551 is a wasteful number, since it uses less digits than its factorization.

56512551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18837520.

The product of its digits is 7500, while the sum is 30.

The square root of 56512551 is about 7517.4830229273. The cubic root of 56512551 is about 383.7499253396.

The spelling of 56512551 in words is "fifty-six million, five hundred twelve thousand, five hundred fifty-one".