22217280 has 56 divisors (see below), whose sum is σ = 70542912. Its totient is φ = 5924352.

The previous prime is 22217263. The next prime is 22217281. The reversal of 22217280 is 8271222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22217280.

It is not an unprimeable number, because it can be changed into a prime (22217281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10612 + ... + 12531.

Almost surely, 2^22217280 is an apocalyptic number.

22217280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22217280 is an abundant number, since it is smaller than the sum of its proper divisors (48325632).

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

22217280 is a wasteful number, since it uses less digits than its factorization.

22217280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23163 (or 23153 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 22217280 is about 4713.5209769343. The cubic root of 22217280 is about 281.1233780637.

The spelling of 22217280 in words is "twenty-two million, two hundred seventeen thousand, two hundred eighty".