56821854 has 32 divisors (see below), whose sum is σ = 120683520. Its totient is φ = 17773952.

The previous prime is 56821819. The next prime is 56821861. The reversal of 56821854 is 45812865.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48277 + ... + 49439.

It is an arithmetic number, because the mean of its divisors is an integer number (3771360).

Almost surely, 2^56821854 is an apocalyptic number.

56821854 is an abundant number, since it is smaller than the sum of its proper divisors (63861666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56821854 is a wasteful number, since it uses less digits than its factorization.

56821854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664.

The product of its digits is 76800, while the sum is 39.

The square root of 56821854 is about 7538.0271954935. The cubic root of 56821854 is about 384.4487619166.

It can be divided in two parts, 56821 and 854, that added together give a palindrome (57675).

The spelling of 56821854 in words is "fifty-six million, eight hundred twenty-one thousand, eight hundred fifty-four".