22251522500 has 120 divisors (see below), whose sum is σ = 52152555840. Its totient is φ = 8282736000.

The previous prime is 22251522487. The next prime is 22251522511. The reversal of 22251522500 is 522515222.

It is a self number, because there is not a number n which added to its sum of digits gives 22251522500.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2122271 + ... + 2132729.

It is an arithmetic number, because the mean of its divisors is an integer number (434604632).

Almost surely, 2^22251522500 is an apocalyptic number.

22251522500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22251522500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26076277920).

22251522500 is an abundant number, since it is smaller than the sum of its proper divisors (29901033340).

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

22251522500 is a wasteful number, since it uses less digits than its factorization.

22251522500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10543 (or 10526 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The spelling of 22251522500 in words is "twenty-two billion, two hundred fifty-one million, five hundred twenty-two thousand, five hundred".