64255231 has 2 divisors, whose sum is σ = 64255232. Its totient is φ = 64255230.

The previous prime is 64255229. The next prime is 64255237. The reversal of 64255231 is 13255246.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64255231 - 2¹ = 64255229 is a prime.

It is a super-2 number, since 2×64255231² = 8257469421726722, which contains 22 as substring.

Together with 64255229, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 64255231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64255237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32127615 + 32127616.

It is an arithmetic number, because the mean of its divisors is an integer number (32127616).

Almost surely, 2^64255231 is an apocalyptic number.

64255231 is a deficient number, since it is larger than the sum of its proper divisors (1).

64255231 is an equidigital number, since it uses as much as digits as its factorization.

64255231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 28.

The square root of 64255231 is about 8015.9360651143. The cubic root of 64255231 is about 400.5310259666.

The spelling of 64255231 in words is "sixty-four million, two hundred fifty-five thousand, two hundred thirty-one".