21952552 has 24 divisors (see below), whose sum is σ = 41727150. Its totient is φ = 10827200.

The previous prime is 21952549. The next prime is 21952571. The reversal of 21952552 is 25525912.

It can be written as a sum of positive squares in 3 ways, for example, as 21846276 + 106276 = 4674^2 + 326^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 81474 + ... + 81742.

Almost surely, 2^21952552 is an apocalyptic number.

It is an amenable number.

21952552 is a deficient number, since it is larger than the sum of its proper divisors (19774598).

21952552 is a wasteful number, since it uses less digits than its factorization.

21952552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477 (or 372 counting only the distinct ones).

The product of its digits is 9000, while the sum is 31.

The square root of 21952552 is about 4685.3550559163. The cubic root of 21952552 is about 280.0023469191.

The spelling of 21952552 in words is "twenty-one million, nine hundred fifty-two thousand, five hundred fifty-two".