21522532 has 12 divisors (see below), whose sum is σ = 38540656. Its totient is φ = 10510920.

The previous prime is 21522521. The next prime is 21522533. The reversal of 21522532 is 23522512.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21522533) 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, 62394 + ... + 62737.

Almost surely, 2^21522532 is an apocalyptic number.

It is an amenable number.

21522532 is a deficient number, since it is larger than the sum of its proper divisors (17018124).

21522532 is a wasteful number, since it uses less digits than its factorization.

21522532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125178 (or 125176 counting only the distinct ones).

The product of its digits is 1200, while the sum is 22.

The square root of 21522532 is about 4639.2382995488. The cubic root of 21522532 is about 278.1619917468.

The spelling of 21522532 in words is "twenty-one million, five hundred twenty-two thousand, five hundred thirty-two".