57215071 has 2 divisors, whose sum is σ = 57215072. Its totient is φ = 57215070.

The previous prime is 57215033. The next prime is 57215077. The reversal of 57215071 is 17051275.

57215071 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 is a cyclic number.

It is not a de Polignac number, because 57215071 - 2⁷ = 57214943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57215077) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28607535 + 28607536.

It is an arithmetic number, because the mean of its divisors is an integer number (28607536).

Almost surely, 2^57215071 is an apocalyptic number.

57215071 is a deficient number, since it is larger than the sum of its proper divisors (1).

57215071 is an equidigital number, since it uses as much as digits as its factorization.

57215071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2450, while the sum is 28.

The square root of 57215071 is about 7564.0644497519. The cubic root of 57215071 is about 385.3335412816. Note that the first 3 decimals are identical.

The spelling of 57215071 in words is "fifty-seven million, two hundred fifteen thousand, seventy-one".