22113731 has 8 divisors (see below), whose sum is σ = 22809600. Its totient is φ = 21428680.

The previous prime is 22113727. The next prime is 22113733. The reversal of 22113731 is 13731122.

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

It is a cyclic number.

It is not a de Polignac number, because 22113731 - 2² = 22113727 is a prime.

It is a super-2 number, since 2×22113731² = 978034197480722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22113733) 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, 1550 + ... + 6828.

It is an arithmetic number, because the mean of its divisors is an integer number (2851200).

Almost surely, 2^22113731 is an apocalyptic number.

22113731 is a deficient number, since it is larger than the sum of its proper divisors (695869).

22113731 is an equidigital number, since it uses as much as digits as its factorization.

22113731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5409.

The product of its digits is 252, while the sum is 20.

The square root of 22113731 is about 4702.5238968027. The cubic root of 22113731 is about 280.6859499756.

Adding to 22113731 its reverse (13731122), we get a palindrome (35844853).

The spelling of 22113731 in words is "twenty-two million, one hundred thirteen thousand, seven hundred thirty-one".