21552822 has 24 divisors (see below), whose sum is σ = 46949760. Its totient is φ = 7145520.

The previous prime is 21552799. The next prime is 21552823. The reversal of 21552822 is 22825512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21552823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 304 + ... + 6572.

It is an arithmetic number, because the mean of its divisors is an integer number (1956240).

Almost surely, 2^21552822 is an apocalyptic number.

21552822 is an abundant number, since it is smaller than the sum of its proper divisors (25396938).

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

21552822 is a wasteful number, since it uses less digits than its factorization.

21552822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6468 (or 6465 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 21552822 is about 4642.5016962840. The cubic root of 21552822 is about 278.2924221446.

The spelling of 21552822 in words is "twenty-one million, five hundred fifty-two thousand, eight hundred twenty-two".