57221571 has 16 divisors (see below), whose sum is σ = 84170880. Its totient is φ = 34288320.

The previous prime is 57221569. The next prime is 57221579. The reversal of 57221571 is 17512275.

It is not a de Polignac number, because 57221571 - 2¹ = 57221569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57221579) 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, 6805 + ... + 12678.

It is an arithmetic number, because the mean of its divisors is an integer number (5260680).

Almost surely, 2^57221571 is an apocalyptic number.

57221571 is a deficient number, since it is larger than the sum of its proper divisors (26949309).

57221571 is a wasteful number, since it uses less digits than its factorization.

57221571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19586.

The product of its digits is 4900, while the sum is 30.

The square root of 57221571 is about 7564.4941007314. The cubic root of 57221571 is about 385.3481328518.

The spelling of 57221571 in words is "fifty-seven million, two hundred twenty-one thousand, five hundred seventy-one".