64531267 has 2 divisors, whose sum is σ = 64531268. Its totient is φ = 64531266.

The previous prime is 64531151. The next prime is 64531273. The reversal of 64531267 is 76213546.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64531267 - 2¹¹ = 64529219 is a prime.

It is not a weakly prime, because it can be changed into another prime (64531297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32265633 + 32265634.

It is an arithmetic number, because the mean of its divisors is an integer number (32265634).

Almost surely, 2^64531267 is an apocalyptic number.

64531267 is a deficient number, since it is larger than the sum of its proper divisors (1).

64531267 is an equidigital number, since it uses as much as digits as its factorization.

64531267 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 34.

The square root of 64531267 is about 8033.1355646472. The cubic root of 64531267 is about 401.1037577457.

The spelling of 64531267 in words is "sixty-four million, five hundred thirty-one thousand, two hundred sixty-seven".