22031113 has 4 divisors (see below), whose sum is σ = 23725828. Its totient is φ = 20336400.

The previous prime is 22031077. The next prime is 22031123. The reversal of 22031113 is 31113022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31113022 = 2 ⋅15556511.

It can be written as a sum of positive squares in 2 ways, for example, as 898704 + 21132409 = 948^2 + 4597^2 .

It is a cyclic number.

It is not a de Polignac number, because 22031113 - 2¹³ = 22022921 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 1694701 = 22031113 / (2 + 2 + 0 + 3 + 1 + 1 + 1 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22031093 and 22031102.

It is not an unprimeable number, because it can be changed into a prime (22031123) 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, 847338 + ... + 847363.

It is an arithmetic number, because the mean of its divisors is an integer number (5931457).

Almost surely, 2^22031113 is an apocalyptic number.

It is an amenable number.

22031113 is a deficient number, since it is larger than the sum of its proper divisors (1694715).

22031113 is a wasteful number, since it uses less digits than its factorization.

22031113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694714.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 22031113 is about 4693.7312449692. The cubic root of 22031113 is about 280.3359615270.

Adding to 22031113 its reverse (31113022), we get a palindrome (53144135).

The spelling of 22031113 in words is "twenty-two million, thirty-one thousand, one hundred thirteen".