21552292 has 24 divisors (see below), whose sum is σ = 38624544. Its totient is φ = 10519872.

The previous prime is 21552283. The next prime is 21552317. The reversal of 21552292 is 29225512.

It is a self number, because there is not a number n which added to its sum of digits gives 21552292.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36423 + ... + 37009.

It is an arithmetic number, because the mean of its divisors is an integer number (1609356).

Almost surely, 2^21552292 is an apocalyptic number.

It is an amenable number.

21552292 is a deficient number, since it is larger than the sum of its proper divisors (17072252).

21552292 is a wasteful number, since it uses less digits than its factorization.

21552292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795 (or 793 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 21552292 is about 4642.4446146400. Note that the first 3 decimals coincide. The cubic root of 21552292 is about 278.2901409863.

The spelling of 21552292 in words is "twenty-one million, five hundred fifty-two thousand, two hundred ninety-two".