22212270 has 24 divisors (see below), whose sum is σ = 57752136. Its totient is φ = 5923248.

The previous prime is 22212257. The next prime is 22212271. The reversal of 22212270 is 7221222.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123312 + ... + 123491.

It is an arithmetic number, because the mean of its divisors is an integer number (2406339).

Almost surely, 2^22212270 is an apocalyptic number.

22212270 is an abundant number, since it is smaller than the sum of its proper divisors (35539866).

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

22212270 is a wasteful number, since it uses less digits than its factorization.

22212270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246816 (or 246813 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 22212270 is about 4712.9894971239. The cubic root of 22212270 is about 281.1022453537.

Adding to 22212270 its reverse (7221222), we get a palindrome (29433492).

The spelling of 22212270 in words is "twenty-two million, two hundred twelve thousand, two hundred seventy".