22502220 has 96 divisors (see below), whose sum is σ = 71886528. Its totient is φ = 5210112.

The previous prime is 22502219. The next prime is 22502239. The reversal of 22502220 is 2220522.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22502220.

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, 12412 + ... + 14108.

It is an arithmetic number, because the mean of its divisors is an integer number (748818).

Almost surely, 2^22502220 is an apocalyptic number.

22502220 is a gapful number since it is divisible by the number (20) 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 22502220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35943264).

22502220 is an abundant number, since it is smaller than the sum of its proper divisors (49384308).

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

22502220 is a wasteful number, since it uses less digits than its factorization.

22502220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739 (or 1737 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 22502220 is about 4743.6504930275. The cubic root of 22502220 is about 282.3200932478.

Adding to 22502220 its reverse (2220522), we get a palindrome (24722742).

It can be divided in two parts, 22502 and 220, that added together give a palindrome (22722).

The spelling of 22502220 in words is "twenty-two million, five hundred two thousand, two hundred twenty".