57281591 has 2 divisors, whose sum is σ = 57281592. Its totient is φ = 57281590.

The previous prime is 57281531. The next prime is 57281629. The reversal of 57281591 is 19518275.

57281591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (57281629) can be obtained adding 57281591 to its sum of digits (38).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57281591 - 2⁶ = 57281527 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57281531) 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, 28640795 + 28640796.

It is an arithmetic number, because the mean of its divisors is an integer number (28640796).

Almost surely, 2^57281591 is an apocalyptic number.

57281591 is a deficient number, since it is larger than the sum of its proper divisors (1).

57281591 is an equidigital number, since it uses as much as digits as its factorization.

57281591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 38.

The square root of 57281591 is about 7568.4602793435. The cubic root of 57281591 is about 385.4828169850.

The spelling of 57281591 in words is "fifty-seven million, two hundred eighty-one thousand, five hundred ninety-one".