57331217 has 2 divisors, whose sum is σ = 57331218. Its totient is φ = 57331216.

The previous prime is 57331201. The next prime is 57331237. The reversal of 57331217 is 71213375.

57331217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53640976 + 3690241 = 7324^2 + 1921^2 .

It is a cyclic number.

It is not a de Polignac number, because 57331217 - 2⁴ = 57331201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57331217.

It is not a weakly prime, because it can be changed into another prime (57331237) 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, 28665608 + 28665609.

It is an arithmetic number, because the mean of its divisors is an integer number (28665609).

Almost surely, 2^57331217 is an apocalyptic number.

It is an amenable number.

57331217 is a deficient number, since it is larger than the sum of its proper divisors (1).

57331217 is an equidigital number, since it uses as much as digits as its factorization.

57331217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4410, while the sum is 29.

The square root of 57331217 is about 7571.7380435406. The cubic root of 57331217 is about 385.5941060756.

The spelling of 57331217 in words is "fifty-seven million, three hundred thirty-one thousand, two hundred seventeen".