22222815552 has 252 divisors, whose sum is σ = 75824644896. Its totient is φ = 6201377280.

The previous prime is 22222815529. The next prime is 22222815607. The reversal of 22222815552 is 25551822222.

22222815552 is a `hidden beast` number, since 2 + 2 + 2 + 22 + 81 + 5 + 552 = 666.

It is a tau number, because it is divible by the number of its divisors (252).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1204477 + ... + 1222787.

It is an arithmetic number, because the mean of its divisors is an integer number (300891448).

Almost surely, 2^22222815552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22222815552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37912322448).

22222815552 is an abundant number, since it is smaller than the sum of its proper divisors (53601829344).

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

22222815552 is a wasteful number, since it uses less digits than its factorization.

22222815552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18386 (or 18366 counting only the distinct ones).

The product of its digits is 64000, while the sum is 36.

The spelling of 22222815552 in words is "twenty-two billion, two hundred twenty-two million, eight hundred fifteen thousand, five hundred fifty-two".