22218252 has 48 divisors (see below), whose sum is σ = 62737920. Its totient is φ = 5974272.

The previous prime is 22218223. The next prime is 22218257. The reversal of 22218252 is 25281222.

It is not an unprimeable number, because it can be changed into a prime (22218257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6352 + ... + 9207.

It is an arithmetic number, because the mean of its divisors is an integer number (1307040).

Almost surely, 2^22218252 is an apocalyptic number.

It is an amenable number.

22218252 is an abundant number, since it is smaller than the sum of its proper divisors (40519668).

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

22218252 is a wasteful number, since it uses less digits than its factorization.

22218252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15590 (or 15588 counting only the distinct ones).

The product of its digits is 1280, while the sum is 24.

The square root of 22218252 is about 4713.6240834415. The cubic root of 22218252 is about 281.1274776945.

Adding to 22218252 its reverse (25281222), we get a palindrome (47499474).

The spelling of 22218252 in words is "twenty-two million, two hundred eighteen thousand, two hundred fifty-two".