57221849 has 2 divisors, whose sum is σ = 57221850. Its totient is φ = 57221848.

The previous prime is 57221809. The next prime is 57221851. The reversal of 57221849 is 94812275.

57221849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54096025 + 3125824 = 7355^2 + 1768^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57221849 is a prime.

Together with 57221851, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57221809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28610924 + 28610925.

It is an arithmetic number, because the mean of its divisors is an integer number (28610925).

Almost surely, 2^57221849 is an apocalyptic number.

It is an amenable number.

57221849 is a deficient number, since it is larger than the sum of its proper divisors (1).

57221849 is an equidigital number, since it uses as much as digits as its factorization.

57221849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 57221849 is about 7564.5124760291. The cubic root of 57221849 is about 385.3487568974.

The spelling of 57221849 in words is "fifty-seven million, two hundred twenty-one thousand, eight hundred forty-nine".