21223522332 has 36 divisors (see below), whose sum is σ = 54149744376. Its totient is φ = 7008389280.

The previous prime is 21223522321. The next prime is 21223522337. The reversal of 21223522332 is 23322532212.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 21223522296 and 21223522305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223522337) 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, 2751019 + ... + 2758722.

It is an arithmetic number, because the mean of its divisors is an integer number (1504159566).

Almost surely, 2^21223522332 is an apocalyptic number.

It is an amenable number.

21223522332 is an abundant number, since it is smaller than the sum of its proper divisors (32926222044).

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

21223522332 is a wasteful number, since it uses less digits than its factorization.

21223522332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5509858 (or 5509853 counting only the distinct ones).

The product of its digits is 8640, while the sum is 27.

The spelling of 21223522332 in words is "twenty-one billion, two hundred twenty-three million, five hundred twenty-two thousand, three hundred thirty-two".