57221107 has 4 divisors (see below), whose sum is σ = 57272920. Its totient is φ = 57169296.

The previous prime is 57221081. The next prime is 57221183. The reversal of 57221107 is 70112275.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57221107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57221207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24213 + ... + 26470.

It is an arithmetic number, because the mean of its divisors is an integer number (14318230).

Almost surely, 2^57221107 is an apocalyptic number.

57221107 is a deficient number, since it is larger than the sum of its proper divisors (51813).

57221107 is a wasteful number, since it uses less digits than its factorization.

57221107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51812.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 57221107 is about 7564.4634310703. The cubic root of 57221107 is about 385.3470912748.

The spelling of 57221107 in words is "fifty-seven million, two hundred twenty-one thousand, one hundred seven".