22281270 has 64 divisors (see below), whose sum is σ = 58786560. Its totient is φ = 5360000.

The previous prime is 22281263. The next prime is 22281277. The reversal of 22281270 is 7218222.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22281263) and next prime (22281277).

It is a self number, because there is not a number n which added to its sum of digits gives 22281270.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22281277) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82696 + ... + 82964.

It is an arithmetic number, because the mean of its divisors is an integer number (918540).

Almost surely, 2^22281270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22281270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29393280).

22281270 is an abundant number, since it is smaller than the sum of its proper divisors (36505290).

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

22281270 is a wasteful number, since it uses less digits than its factorization.

22281270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541.

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

The square root of 22281270 is about 4720.3040156329. The cubic root of 22281270 is about 281.3930156593.

Adding to 22281270 its reverse (7218222), we get a palindrome (29499492).

The spelling of 22281270 in words is "twenty-two million, two hundred eighty-one thousand, two hundred seventy".