21582328522 has 8 divisors (see below), whose sum is σ = 32376779172. Its totient is φ = 10790068800.

The previous prime is 21582328519. The next prime is 21582328541. The reversal of 21582328522 is 22582328512.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16954383681 + 4627944841 = 130209^2 + 68029^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522879 + ... + 562642.

Almost surely, 2^21582328522 is an apocalyptic number.

21582328522 is a deficient number, since it is larger than the sum of its proper divisors (10794450650).

21582328522 is a wasteful number, since it uses less digits than its factorization.

21582328522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095464.

The product of its digits is 153600, while the sum is 40.

The spelling of 21582328522 in words is "twenty-one billion, five hundred eighty-two million, three hundred twenty-eight thousand, five hundred twenty-two".