57082821 has 16 divisors (see below), whose sum is σ = 84830400. Its totient is φ = 33931008.

The previous prime is 57082799. The next prime is 57082829. The reversal of 57082821 is 12828075.

57082821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 57082821 - 2⁷ = 57082693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57082829) 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 15 ways as a sum of consecutive naturals, for example, 28486 + ... + 30423.

It is an arithmetic number, because the mean of its divisors is an integer number (5301900).

Almost surely, 2^57082821 is an apocalyptic number.

57082821 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

57082821 is a deficient number, since it is larger than the sum of its proper divisors (27747579).

57082821 is a wasteful number, since it uses less digits than its factorization.

57082821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58948.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 57082821 is about 7555.3173990243. The cubic root of 57082821 is about 385.0364186609.

The spelling of 57082821 in words is "fifty-seven million, eighty-two thousand, eight hundred twenty-one".