57228557 has 2 divisors, whose sum is σ = 57228558. Its totient is φ = 57228556.

The previous prime is 57228539. The next prime is 57228581. The reversal of 57228557 is 75582275.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31685641 + 25542916 = 5629^2 + 5054^2 .

It is a cyclic number.

It is not a de Polignac number, because 57228557 - 2²² = 53034253 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57228517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28614278 + 28614279.

It is an arithmetic number, because the mean of its divisors is an integer number (28614279).

Almost surely, 2^57228557 is an apocalyptic number.

It is an amenable number.

57228557 is a deficient number, since it is larger than the sum of its proper divisors (1).

57228557 is an equidigital number, since it uses as much as digits as its factorization.

57228557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 196000, while the sum is 41.

The square root of 57228557 is about 7564.9558491772. The cubic root of 57228557 is about 385.3638141905.

The spelling of 57228557 in words is "fifty-seven million, two hundred twenty-eight thousand, five hundred fifty-seven".