57021863 has 2 divisors, whose sum is σ = 57021864. Its totient is φ = 57021862.

The previous prime is 57021823. The next prime is 57021871. The reversal of 57021863 is 36812075.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57021863 - 2⁸ = 57021607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57021823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28510931 + 28510932.

It is an arithmetic number, because the mean of its divisors is an integer number (28510932).

Almost surely, 2^57021863 is an apocalyptic number.

57021863 is a deficient number, since it is larger than the sum of its proper divisors (1).

57021863 is an equidigital number, since it uses as much as digits as its factorization.

57021863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 57021863 is about 7551.2822090027. The cubic root of 57021863 is about 384.8993113879.

The spelling of 57021863 in words is "fifty-seven million, twenty-one thousand, eight hundred sixty-three".