57213089 has 2 divisors, whose sum is σ = 57213090. Its totient is φ = 57213088.

The previous prime is 57213077. The next prime is 57213133. The reversal of 57213089 is 98031275.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45427600 + 11785489 = 6740^2 + 3433^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57213089 is a prime.

It is not a weakly prime, because it can be changed into another prime (57215089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28606544 + 28606545.

It is an arithmetic number, because the mean of its divisors is an integer number (28606545).

Almost surely, 2^57213089 is an apocalyptic number.

It is an amenable number.

57213089 is a deficient number, since it is larger than the sum of its proper divisors (1).

57213089 is an equidigital number, since it uses as much as digits as its factorization.

57213089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 57213089 is about 7563.9334343977. The cubic root of 57213089 is about 385.3290917552.

The spelling of 57213089 in words is "fifty-seven million, two hundred thirteen thousand, eighty-nine".