64631522 has 8 divisors (see below), whose sum is σ = 97047516. Its totient is φ = 32282352.

The previous prime is 64631509. The next prime is 64631527. The reversal of 64631522 is 22513646.

It can be written as a sum of positive squares in 2 ways, for example, as 52722121 + 11909401 = 7261^2 + 3451^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (64631527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14213 + ... + 18200.

Almost surely, 2^64631522 is an apocalyptic number.

64631522 is a deficient number, since it is larger than the sum of its proper divisors (32415994).

64631522 is a wasteful number, since it uses less digits than its factorization.

64631522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33412.

The product of its digits is 8640, while the sum is 29.

The square root of 64631522 is about 8039.3732342764. The cubic root of 64631522 is about 401.3113669271.

The spelling of 64631522 in words is "sixty-four million, six hundred thirty-one thousand, five hundred twenty-two".