57216559 has 2 divisors, whose sum is σ = 57216560. Its totient is φ = 57216558.

The previous prime is 57216553. The next prime is 57216563. The reversal of 57216559 is 95561275.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57216559 - 2⁵ = 57216527 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 (57216553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28608279 + 28608280.

It is an arithmetic number, because the mean of its divisors is an integer number (28608280).

Almost surely, 2^57216559 is an apocalyptic number.

57216559 is a deficient number, since it is larger than the sum of its proper divisors (1).

57216559 is an equidigital number, since it uses as much as digits as its factorization.

57216559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94500, while the sum is 40.

The square root of 57216559 is about 7564.1628089300. The cubic root of 57216559 is about 385.3368817263.

It can be divided in two parts, 5721655 and 9, that added together give a square (5721664 = 2392²).

The spelling of 57216559 in words is "fifty-seven million, two hundred sixteen thousand, five hundred fifty-nine".