56451899 has 32 divisors (see below), whose sum is σ = 70041600. Its totient is φ = 44478720.

The previous prime is 56451877. The next prime is 56451911. The reversal of 56451899 is 99815465.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 56451899 - 2⁸ = 56451643 is a prime.

It is a Duffinian number.

Its product of digits (388800) is a multiple of the sum of its prime divisors (243).

It is not an unprimeable number, because it can be changed into a prime (56451799) 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, 634247 + ... + 634335.

It is an arithmetic number, because the mean of its divisors is an integer number (2188800).

Almost surely, 2^56451899 is an apocalyptic number.

56451899 is a deficient number, since it is larger than the sum of its proper divisors (13589701).

56451899 is a wasteful number, since it uses less digits than its factorization.

56451899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243.

The product of its digits is 388800, while the sum is 47.

The square root of 56451899 is about 7513.4478769737. The cubic root of 56451899 is about 383.6125898763.

The spelling of 56451899 in words is "fifty-six million, four hundred fifty-one thousand, eight hundred ninety-nine".