22225240 has 32 divisors (see below), whose sum is σ = 50759280. Its totient is φ = 8756352.

The previous prime is 22225211. The next prime is 22225277. The reversal of 22225240 is 4252222.

It is a super-2 number, since 2×22225240² = 987922586115200, which contains 22 as substring.

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, 1467 + ... + 6826.

Almost surely, 2^22225240 is an apocalyptic number.

22225240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22225240 is an abundant number, since it is smaller than the sum of its proper divisors (28534040).

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

22225240 is a wasteful number, since it uses less digits than its factorization.

22225240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8371 (or 8367 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 22225240 is about 4714.3652807138. The cubic root of 22225240 is about 281.1569476530.

Adding to 22225240 its reverse (4252222), we get a palindrome (26477462).

The spelling of 22225240 in words is "twenty-two million, two hundred twenty-five thousand, two hundred forty".