22243381 has 4 divisors (see below), whose sum is σ = 22279264. Its totient is φ = 22207500.

The previous prime is 22243379. The next prime is 22243387. The reversal of 22243381 is 18334222.

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.

It is a cyclic number.

It is not a de Polignac number, because 22243381 - 2¹ = 22243379 is a prime.

It is a super-2 number, since 2×22243381² = 989535996622322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22243387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16995 + ... + 18256.

It is an arithmetic number, because the mean of its divisors is an integer number (5569816).

Almost surely, 2^22243381 is an apocalyptic number.

It is an amenable number.

22243381 is a deficient number, since it is larger than the sum of its proper divisors (35883).

22243381 is an equidigital number, since it uses as much as digits as its factorization.

22243381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35882.

The product of its digits is 2304, while the sum is 25.

The square root of 22243381 is about 4716.2889012443. The cubic root of 22243381 is about 281.2334234839.

The spelling of 22243381 in words is "twenty-two million, two hundred forty-three thousand, three hundred eighty-one".