57455321 has 16 divisors (see below), whose sum is σ = 72852480. Its totient is φ = 44008080.

The previous prime is 57455287. The next prime is 57455327. The reversal of 57455321 is 12355475.

It is a cyclic number.

It is not a de Polignac number, because 57455321 - 2¹⁸ = 57193177 is a prime.

It is a super-2 number, since 2×57455321² = 6602227822426082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57455327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1781 + ... + 10866.

It is an arithmetic number, because the mean of its divisors is an integer number (4553280).

Almost surely, 2^57455321 is an apocalyptic number.

It is an amenable number.

57455321 is a deficient number, since it is larger than the sum of its proper divisors (15397159).

57455321 is a wasteful number, since it uses less digits than its factorization.

57455321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12724.

The product of its digits is 21000, while the sum is 32.

The square root of 57455321 is about 7579.9288255234. The cubic root of 57455321 is about 385.8721354254.

The spelling of 57455321 in words is "fifty-seven million, four hundred fifty-five thousand, three hundred twenty-one".