22217130 has 96 divisors (see below), whose sum is σ = 65926224. Its totient is φ = 5142528.

The previous prime is 22217119. The next prime is 22217141. The reversal of 22217130 is 3171222.

It is an interprime number because it is at equal distance from previous prime (22217119) and next prime (22217141).

It can be written as a sum of positive squares in 8 ways, for example, as 3059001 + 19158129 = 1749^2 + 4377^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19332 + ... + 20448.

Almost surely, 2^22217130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22217130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32963112).

22217130 is an abundant number, since it is smaller than the sum of its proper divisors (43709094).

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

22217130 is a wasteful number, since it uses less digits than its factorization.

22217130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160 (or 1157 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 22217130 is about 4713.5050652354. The cubic root of 22217130 is about 281.1227453939.

Adding to 22217130 its reverse (3171222), we get a palindrome (25388352).

The spelling of 22217130 in words is "twenty-two million, two hundred seventeen thousand, one hundred thirty".