22255544520 has 192 divisors, whose sum is σ = 79559850240. Its totient is φ = 5395167360.

The previous prime is 22255544497. The next prime is 22255544527. The reversal of 22255544520 is 2544555222.

22255544520 is a `hidden beast` number, since 22 + 25 + 55 + 44 + 520 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (22255544527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 455937 + ... + 502383.

It is an arithmetic number, because the mean of its divisors is an integer number (414374220).

Almost surely, 2^22255544520 is an apocalyptic number.

22255544520 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 22255544520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39779925120).

22255544520 is an abundant number, since it is smaller than the sum of its proper divisors (57304305720).

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

22255544520 is a wasteful number, since it uses less digits than its factorization.

22255544520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46497 (or 46468 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 36.

The spelling of 22255544520 in words is "twenty-two billion, two hundred fifty-five million, five hundred forty-four thousand, five hundred twenty".