22553221500 has 192 divisors, whose sum is σ = 73090442880. Its totient is φ = 6004454400.

The previous prime is 22553221459. The next prime is 22553221541. The reversal of 22553221500 is 512235522.

It is an interprime number because it is at equal distance from previous prime (22553221459) and next prime (22553221541).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12864624 + ... + 12866376.

It is an arithmetic number, because the mean of its divisors is an integer number (380679390).

Almost surely, 2^22553221500 is an apocalyptic number.

22553221500 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 22553221500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36545221440).

22553221500 is an abundant number, since it is smaller than the sum of its proper divisors (50537221380).

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

22553221500 is a wasteful number, since it uses less digits than its factorization.

22553221500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2734 (or 2716 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The spelling of 22553221500 in words is "twenty-two billion, five hundred fifty-three million, two hundred twenty-one thousand, five hundred".