21552294 has 16 divisors (see below), whose sum is σ = 45640368. Its totient is φ = 6761472.

The previous prime is 21552283. The next prime is 21552317. The reversal of 21552294 is 49225512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105547 + ... + 105750.

It is an arithmetic number, because the mean of its divisors is an integer number (2852523).

Almost surely, 2^21552294 is an apocalyptic number.

21552294 is an abundant number, since it is smaller than the sum of its proper divisors (24088074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21552294 is a wasteful number, since it uses less digits than its factorization.

21552294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211319.

The product of its digits is 7200, while the sum is 30.

The square root of 21552294 is about 4642.4448300438. Note that the first 3 decimals coincide. The cubic root of 21552294 is about 278.2901495945.

The spelling of 21552294 in words is "twenty-one million, five hundred fifty-two thousand, two hundred ninety-four".