22243731 has 8 divisors (see below), whose sum is σ = 29875344. Its totient is φ = 14720640.

The previous prime is 22243723. The next prime is 22243733. The reversal of 22243731 is 13734222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22243731 - 2³ = 22243723 is a prime.

It is a super-2 number, since 2×22243731² = 989567137600722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22243733) 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 7 ways as a sum of consecutive naturals, for example, 26650 + ... + 27471.

It is an arithmetic number, because the mean of its divisors is an integer number (3734418).

Almost surely, 2^22243731 is an apocalyptic number.

22243731 is a deficient number, since it is larger than the sum of its proper divisors (7631613).

22243731 is a wasteful number, since it uses less digits than its factorization.

22243731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54261.

The product of its digits is 2016, while the sum is 24.

The square root of 22243731 is about 4716.3260065437. The cubic root of 22243731 is about 281.2348985472.

Adding to 22243731 its reverse (13734222), we get a palindrome (35977953).

The spelling of 22243731 in words is "twenty-two million, two hundred forty-three thousand, seven hundred thirty-one".