22552220 has 24 divisors (see below), whose sum is σ = 47526864. Its totient is φ = 8989056.

The previous prime is 22552199. The next prime is 22552237. The reversal of 22552220 is 2225522.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22552192 and 22552201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4304 + ... + 7976.

It is an arithmetic number, because the mean of its divisors is an integer number (1980286).

Almost surely, 2^22552220 is an apocalyptic number.

22552220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22552220 is an abundant number, since it is smaller than the sum of its proper divisors (24974644).

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

22552220 is a wasteful number, since it uses less digits than its factorization.

22552220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3989 (or 3987 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 22552220 is about 4748.9177714507. The cubic root of 22552220 is about 282.5290439244.

Adding to 22552220 its reverse (2225522), we get a palindrome (24777742).

The spelling of 22552220 in words is "twenty-two million, five hundred fifty-two thousand, two hundred twenty".