64043531 has 2 divisors, whose sum is σ = 64043532. Its totient is φ = 64043530.

The previous prime is 64043521. The next prime is 64043537. The reversal of 64043531 is 13534046.

64043531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64043531 - 2²² = 59849227 is a prime.

It is a super-2 number, since 2×64043531² = 8203147725895922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64043531.

It is not a weakly prime, because it can be changed into another prime (64043537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32021765 + 32021766.

It is an arithmetic number, because the mean of its divisors is an integer number (32021766).

Almost surely, 2^64043531 is an apocalyptic number.

64043531 is a deficient number, since it is larger than the sum of its proper divisors (1).

64043531 is an equidigital number, since it uses as much as digits as its factorization.

64043531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 64043531 is about 8002.7202250235. The cubic root of 64043531 is about 400.0906690296.

Adding to 64043531 its reverse (13534046), we get a palindrome (77577577).

The spelling of 64043531 in words is "sixty-four million, forty-three thousand, five hundred thirty-one".