22217250 has 64 divisors (see below), whose sum is σ = 60518016. Its totient is φ = 5384000.

The previous prime is 22217233. The next prime is 22217263. The reversal of 22217250 is 5271222.

It is a happy number.

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, 6904 + ... + 9596.

It is an arithmetic number, because the mean of its divisors is an integer number (945594).

Almost surely, 2^22217250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22217250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30259008).

22217250 is an abundant number, since it is smaller than the sum of its proper divisors (38300766).

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

22217250 is a wasteful number, since it uses less digits than its factorization.

22217250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2724 (or 2714 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 22217250 is about 4713.5177945988. The cubic root of 22217250 is about 281.1232515299.

Adding to 22217250 its reverse (5271222), we get a palindrome (27488472).

It can be divided in two parts, 222172 and 50, that added together give a palindrome (222222).

The spelling of 22217250 in words is "twenty-two million, two hundred seventeen thousand, two hundred fifty".