22113131 has 4 divisors (see below), whose sum is σ = 23277000. Its totient is φ = 20949264.

The previous prime is 22113121. The next prime is 22113151. The reversal of 22113131 is 13131122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13131122 = 2 ⋅6565561.

It is a cyclic number.

It is not a de Polignac number, because 22113131 - 2⁶ = 22113067 is a prime.

It is a super-2 number, since 2×22113131² = 977981125246322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22113101) 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, 581906 + ... + 581943.

It is an arithmetic number, because the mean of its divisors is an integer number (5819250).

Almost surely, 2^22113131 is an apocalyptic number.

22113131 is a deficient number, since it is larger than the sum of its proper divisors (1163869).

22113131 is a wasteful number, since it uses less digits than its factorization.

22113131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163868.

The product of its digits is 36, while the sum is 14.

The square root of 22113131 is about 4702.4601008408. The cubic root of 22113131 is about 280.6834113855.

Adding to 22113131 its reverse (13131122), we get a palindrome (35244253).

Subtracting from 22113131 its reverse (13131122), we obtain a square (8982009 = 2997²).

The spelling of 22113131 in words is "twenty-two million, one hundred thirteen thousand, one hundred thirty-one".