22155525252 has 144 divisors (see below), whose sum is σ = 65528444800. Its totient is φ = 6180986880.

The previous prime is 22155525233. The next prime is 22155525341. The reversal of 22155525252 is 25252555122.

22155525252 is a `hidden beast` number, since 2 + 2 + 1 + 5 + 552 + 52 + 52 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2131524 + ... + 2141892.

Almost surely, 2^22155525252 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 22155525252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32764222400).

22155525252 is an abundant number, since it is smaller than the sum of its proper divisors (43372919548).

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

22155525252 is a wasteful number, since it uses less digits than its factorization.

22155525252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10586 (or 10581 counting only the distinct ones).

The product of its digits is 100000, while the sum is 36.

The spelling of 22155525252 in words is "twenty-two billion, one hundred fifty-five million, five hundred twenty-five thousand, two hundred fifty-two".