22181131 has 8 divisors (see below), whose sum is σ = 26452224. Its totient is φ = 18185640.

The previous prime is 22181069. The next prime is 22181147. The reversal of 22181131 is 13118122.

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

It is not a de Polignac number, because 22181131 - 2¹⁷ = 22050059 is a prime.

It is a super-2 number, since 2×22181131² = 984005144878322, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 22181131 parts by 6660 straight cuts.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22181099 and 22181108.

It is not an unprimeable number, because it can be changed into a prime (22181161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68725 + ... + 69046.

It is an arithmetic number, because the mean of its divisors is an integer number (3306528).

Almost surely, 2^22181131 is an apocalyptic number.

22181131 is a deficient number, since it is larger than the sum of its proper divisors (4271093).

22181131 is a wasteful number, since it uses less digits than its factorization.

22181131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137801.

The product of its digits is 96, while the sum is 19.

The square root of 22181131 is about 4709.6848089867. The cubic root of 22181131 is about 280.9708264525.

Adding to 22181131 its reverse (13118122), we get a palindrome (35299253).

The spelling of 22181131 in words is "twenty-two million, one hundred eighty-one thousand, one hundred thirty-one".