22011552 has 72 divisors (see below), whose sum is σ = 65336544. Its totient is φ = 7016064.

The previous prime is 22011523. The next prime is 22011553. The reversal of 22011552 is 25511022.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22011553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4963 + ... + 8285.

It is an arithmetic number, because the mean of its divisors is an integer number (907452).

Almost surely, 2^22011552 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 22011552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32668272).

22011552 is an abundant number, since it is smaller than the sum of its proper divisors (43324992).

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

22011552 is a wasteful number, since it uses less digits than its factorization.

22011552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3362 (or 3351 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 22011552 is about 4691.6470455481. The cubic root of 22011552 is about 280.2529686631.

Adding to 22011552 its reverse (25511022), we get a palindrome (47522574).

The spelling of 22011552 in words is "twenty-two million, eleven thousand, five hundred fifty-two".