63566431 has 2 divisors, whose sum is σ = 63566432. Its totient is φ = 63566430.

The previous prime is 63566389. The next prime is 63566443. The reversal of 63566431 is 13466536.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63566431 - 2¹³ = 63558239 is a prime.

It is a super-2 number, since 2×63566431² = 8081382300155522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63566491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31783215 + 31783216.

It is an arithmetic number, because the mean of its divisors is an integer number (31783216).

Almost surely, 2^63566431 is an apocalyptic number.

63566431 is a deficient number, since it is larger than the sum of its proper divisors (1).

63566431 is an equidigital number, since it uses as much as digits as its factorization.

63566431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 34.

The square root of 63566431 is about 7972.8558873217. The cubic root of 63566431 is about 399.0946838023.

The spelling of 63566431 in words is "sixty-three million, five hundred sixty-six thousand, four hundred thirty-one".