22021564543552 has 224 divisors, whose sum is σ = 53036124641280. Its totient is φ = 8871411548160.

The previous prime is 22021564543547. The next prime is 22021564543567. The reversal of 22021564543552 is 25534546512022.

It is a tau number, because it is divible by the number of its divisors (224).

It is a super-2 number, since 2×22021564543552² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 304680474 + ... + 304752742.

Almost surely, 2^{22021564543552} 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 22021564543552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26518062320640).

22021564543552 is an abundant number, since it is smaller than the sum of its proper divisors (31014560097728).

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

22021564543552 is a wasteful number, since it uses less digits than its factorization.

22021564543552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72949 (or 72939 counting only the distinct ones).

The product of its (nonzero) digits is 2880000, while the sum is 46.

The spelling of 22021564543552 in words is "twenty-two trillion, twenty-one billion, five hundred sixty-four million, five hundred forty-three thousand, five hundred fifty-two".