22201564 has 36 divisors (see below), whose sum is σ = 48814192. Its totient is φ = 8648640.

The previous prime is 22201561. The next prime is 22201567. The reversal of 22201564 is 46510222.

It is an interprime number because it is at equal distance from previous prime (22201561) and next prime (22201567).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22201561) 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, 112 + ... + 6664.

Almost surely, 2^22201564 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 22201564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24407096).

22201564 is an abundant number, since it is smaller than the sum of its proper divisors (26612628).

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

22201564 is a wasteful number, since it uses less digits than its factorization.

22201564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6586 (or 6573 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 22201564 is about 4711.8535630896. The cubic root of 22201564 is about 281.0570756603.

Adding to 22201564 its reverse (46510222), we get a palindrome (68711786).

The spelling of 22201564 in words is "twenty-two million, two hundred one thousand, five hundred sixty-four".