21222532422 has 192 divisors, whose sum is σ = 58250949120. Its totient is φ = 5434560000.

The previous prime is 21222532417. The next prime is 21222532433. The reversal of 21222532422 is 22423522212.

It is a happy number.

21222532422 is a `hidden beast` number, since 2 + 12 + 225 + 3 + 2 + 422 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16856029 + ... + 16857287.

It is an arithmetic number, because the mean of its divisors is an integer number (303390360).

Almost surely, 2^21222532422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21222532422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29125474560).

21222532422 is an abundant number, since it is smaller than the sum of its proper divisors (37028416698).

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

21222532422 is a wasteful number, since it uses less digits than its factorization.

21222532422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579 (or 1576 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The spelling of 21222532422 in words is "twenty-one billion, two hundred twenty-two million, five hundred thirty-two thousand, four hundred twenty-two".