21524213522 has 32 divisors (see below), whose sum is σ = 37027428480. Its totient is φ = 9192522240.

The previous prime is 21524213509. The next prime is 21524213549. The reversal of 21524213522 is 22531242512.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8099618 + ... + 8102274.

It is an arithmetic number, because the mean of its divisors is an integer number (1157107140).

Almost surely, 2^21524213522 is an apocalyptic number.

21524213522 is a deficient number, since it is larger than the sum of its proper divisors (15503214958).

21524213522 is a wasteful number, since it uses less digits than its factorization.

21524213522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4466.

The product of its digits is 9600, while the sum is 29.

The spelling of 21524213522 in words is "twenty-one billion, five hundred twenty-four million, two hundred thirteen thousand, five hundred twenty-two".