57121571 has 4 divisors (see below), whose sum is σ = 61515552. Its totient is φ = 52727592.

The previous prime is 57121553. The next prime is 57121573. The reversal of 57121571 is 17512175.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57121571 - 2¹⁴ = 57105187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57121573) 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, 2196971 + ... + 2196996.

It is an arithmetic number, because the mean of its divisors is an integer number (15378888).

Almost surely, 2^57121571 is an apocalyptic number.

57121571 is a deficient number, since it is larger than the sum of its proper divisors (4393981).

57121571 is a wasteful number, since it uses less digits than its factorization.

57121571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4393980.

The product of its digits is 2450, while the sum is 29.

The square root of 57121571 is about 7557.8813830332. The cubic root of 57121571 is about 385.1235247646.

The spelling of 57121571 in words is "fifty-seven million, one hundred twenty-one thousand, five hundred seventy-one".