57164457221 has 4 divisors (see below), whose sum is σ = 57451716000. Its totient is φ = 56877198444.

The previous prime is 57164457169. The next prime is 57164457223. The reversal of 57164457221 is 12275446175.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57164457221 - 2³⁴ = 39984588037 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 (57164457223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143629091 + ... + 143629488.

It is an arithmetic number, because the mean of its divisors is an integer number (14362929000).

Almost surely, 2^57164457221 is an apocalyptic number.

It is an amenable number.

57164457221 is a deficient number, since it is larger than the sum of its proper divisors (287258779).

57164457221 is a wasteful number, since it uses less digits than its factorization.

57164457221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287258778.

The product of its digits is 470400, while the sum is 44.

The spelling of 57164457221 in words is "fifty-seven billion, one hundred sixty-four million, four hundred fifty-seven thousand, two hundred twenty-one".