22315224 has 64 divisors (see below), whose sum is σ = 57968640. Its totient is φ = 7153920.

The previous prime is 22315217. The next prime is 22315231. The reversal of 22315224 is 42251322.

It is an interprime number because it is at equal distance from previous prime (22315217) and next prime (22315231).

It is a super-3 number, since 3×22315224³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22315224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82209 + ... + 82479.

It is an arithmetic number, because the mean of its divisors is an integer number (905760).

Almost surely, 2^22315224 is an apocalyptic number.

22315224 is a gapful number since it is divisible by the number (24) 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 22315224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28984320).

22315224 is an abundant number, since it is smaller than the sum of its proper divisors (35653416).

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

22315224 is a wasteful number, since it uses less digits than its factorization.

22315224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 396 counting only the distinct ones).

The product of its digits is 960, while the sum is 21.

The square root of 22315224 is about 4723.8992368593. The cubic root of 22315224 is about 281.5358795878.

Adding to 22315224 its reverse (42251322), we get a palindrome (64566546).

The spelling of 22315224 in words is "twenty-two million, three hundred fifteen thousand, two hundred twenty-four".