57321149 has 2 divisors, whose sum is σ = 57321150. Its totient is φ = 57321148.

The previous prime is 57321109. The next prime is 57321191. The reversal of 57321149 is 94112375.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34692100 + 22629049 = 5890^2 + 4757^2 .

It is a cyclic number.

It is not a de Polignac number, because 57321149 - 2²⁴ = 40543933 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57321109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28660574 + 28660575.

It is an arithmetic number, because the mean of its divisors is an integer number (28660575).

Almost surely, 2^57321149 is an apocalyptic number.

It is an amenable number.

57321149 is a deficient number, since it is larger than the sum of its proper divisors (1).

57321149 is an equidigital number, since it uses as much as digits as its factorization.

57321149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 32.

The square root of 57321149 is about 7571.0731735996. The cubic root of 57321149 is about 385.5715332148.

The spelling of 57321149 in words is "fifty-seven million, three hundred twenty-one thousand, one hundred forty-nine".