56045399 has 4 divisors (see below), whose sum is σ = 56074200. Its totient is φ = 56016600.

The previous prime is 56045393. The next prime is 56045419. The reversal of 56045399 is 99354065.

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 56045399 - 2¹² = 56041303 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 (56045393) 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, 11252 + ... + 15449.

It is an arithmetic number, because the mean of its divisors is an integer number (14018550).

Almost surely, 2^56045399 is an apocalyptic number.

56045399 is a deficient number, since it is larger than the sum of its proper divisors (28801).

56045399 is a wasteful number, since it uses less digits than its factorization.

56045399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28800.

The product of its (nonzero) digits is 145800, while the sum is 41.

The square root of 56045399 is about 7486.3475072962. The cubic root of 56045399 is about 382.6895957271.

The spelling of 56045399 in words is "fifty-six million, forty-five thousand, three hundred ninety-nine".