22253981 has 4 divisors (see below), whose sum is σ = 22264512. Its totient is φ = 22243452.

The previous prime is 22253963. The next prime is 22253993. The reversal of 22253981 is 18935222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22253981 - 2²² = 18059677 is a prime.

It is a super-2 number, since 2×22253981² = 990479340696722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22253081) 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, 875 + ... + 6728.

It is an arithmetic number, because the mean of its divisors is an integer number (5566128).

Almost surely, 2^22253981 is an apocalyptic number.

It is an amenable number.

22253981 is a deficient number, since it is larger than the sum of its proper divisors (10531).

22253981 is an equidigital number, since it uses as much as digits as its factorization.

22253981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10530.

The product of its digits is 8640, while the sum is 32.

The square root of 22253981 is about 4717.4125323105. The cubic root of 22253981 is about 281.2780899681.

The spelling of 22253981 in words is "twenty-two million, two hundred fifty-three thousand, nine hundred eighty-one".