56512399 has 4 divisors (see below), whose sum is σ = 56737800. Its totient is φ = 56287000.

The previous prime is 56512397. The next prime is 56512409. The reversal of 56512399 is 99321565.

It is a happy number.

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 56512399 - 2¹ = 56512397 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 (56512397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112324 + ... + 112825.

It is an arithmetic number, because the mean of its divisors is an integer number (14184450).

Almost surely, 2^56512399 is an apocalyptic number.

56512399 is a deficient number, since it is larger than the sum of its proper divisors (225401).

56512399 is a wasteful number, since it uses less digits than its factorization.

56512399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225400.

The product of its digits is 72900, while the sum is 40.

The square root of 56512399 is about 7517.4729131537. The cubic root of 56512399 is about 383.7495812860.

The spelling of 56512399 in words is "fifty-six million, five hundred twelve thousand, three hundred ninety-nine".