22113831 has 4 divisors (see below), whose sum is σ = 29485112. Its totient is φ = 14742552.

The previous prime is 22113823. The next prime is 22113887. The reversal of 22113831 is 13831122.

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

It is not a de Polignac number, because 22113831 - 2³ = 22113823 is a prime.

It is a super-2 number, since 2×22113831² = 978043042993122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22113798 and 22113807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22115831) 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, 3685636 + ... + 3685641.

It is an arithmetic number, because the mean of its divisors is an integer number (7371278).

Almost surely, 2^22113831 is an apocalyptic number.

22113831 is a deficient number, since it is larger than the sum of its proper divisors (7371281).

22113831 is an equidigital number, since it uses as much as digits as its factorization.

22113831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7371280.

The product of its digits is 288, while the sum is 21.

The square root of 22113831 is about 4702.5345293788. The cubic root of 22113831 is about 280.6863730694.

Adding to 22113831 its reverse (13831122), we get a palindrome (35944953).

The spelling of 22113831 in words is "twenty-two million, one hundred thirteen thousand, eight hundred thirty-one".