57521287 has 2 divisors, whose sum is σ = 57521288. Its totient is φ = 57521286.

The previous prime is 57521281. The next prime is 57521293. The reversal of 57521287 is 78212575.

It is a balanced prime because it is at equal distance from previous prime (57521281) and next prime (57521293).

It is a cyclic number.

It is not a de Polignac number, because 57521287 - 2⁷ = 57521159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57521281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28760643 + 28760644.

It is an arithmetic number, because the mean of its divisors is an integer number (28760644).

Almost surely, 2^57521287 is an apocalyptic number.

57521287 is a deficient number, since it is larger than the sum of its proper divisors (1).

57521287 is an equidigital number, since it uses as much as digits as its factorization.

57521287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39200, while the sum is 37.

The square root of 57521287 is about 7584.2789373809. The cubic root of 57521287 is about 386.0197556714.

The spelling of 57521287 in words is "fifty-seven million, five hundred twenty-one thousand, two hundred eighty-seven".