22001524552 has 128 divisors (see below), whose sum is σ = 49816166400. Its totient is φ = 8906439168.

The previous prime is 22001524537. The next prime is 22001524561. The reversal of 22001524552 is 25542510022.

It is a super-2 number, since 2×22001524552² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 22001524552.

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, 50117149 + ... + 50117587.

It is an arithmetic number, because the mean of its divisors is an integer number (389188800).

Almost surely, 2^22001524552 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 22001524552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24908083200).

22001524552 is an abundant number, since it is smaller than the sum of its proper divisors (27814641848).

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

22001524552 is a wasteful number, since it uses less digits than its factorization.

22001524552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875 (or 871 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

The spelling of 22001524552 in words is "twenty-two billion, one million, five hundred twenty-four thousand, five hundred fifty-two".