22253281 has 4 divisors (see below), whose sum is σ = 22308100. Its totient is φ = 22198464.

The previous prime is 22253279. The next prime is 22253291. The reversal of 22253281 is 18235222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12362256 + 9891025 = 3516^2 + 3145^2 .

It is a cyclic number.

It is not a de Polignac number, because 22253281 - 2¹ = 22253279 is a prime.

It is a super-2 number, since 2×22253281² = 990417030529922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22253261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26796 + ... + 27613.

It is an arithmetic number, because the mean of its divisors is an integer number (5577025).

Almost surely, 2^22253281 is an apocalyptic number.

It is an amenable number.

22253281 is a deficient number, since it is larger than the sum of its proper divisors (54819).

22253281 is an equidigital number, since it uses as much as digits as its factorization.

22253281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54818.

The product of its digits is 1920, while the sum is 25.

The square root of 22253281 is about 4717.3383385125. The cubic root of 22253281 is about 281.2751407320.

The spelling of 22253281 in words is "twenty-two million, two hundred fifty-three thousand, two hundred eighty-one".