22117240 has 32 divisors (see below), whose sum is σ = 50058000. Its totient is φ = 8794624.

The previous prime is 22117223. The next prime is 22117241. The reversal of 22117240 is 4271122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22117241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5616 + ... + 8704.

Almost surely, 2^22117240 is an apocalyptic number.

22117240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22117240 is an abundant number, since it is smaller than the sum of its proper divisors (27940760).

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

22117240 is a wasteful number, since it uses less digits than its factorization.

22117240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3279 (or 3275 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 22117240 is about 4702.8969795223. The cubic root of 22117240 is about 280.7007955770.

Adding to 22117240 its reverse (4271122), we get a palindrome (26388362).

The spelling of 22117240 in words is "twenty-two million, one hundred seventeen thousand, two hundred forty".