22131161 has 16 divisors (see below), whose sum is σ = 25401600. Its totient is φ = 19100928.

The previous prime is 22131133. The next prime is 22131199. The reversal of 22131161 is 16113122.

It is not a de Polignac number, because 22131161 - 2⁶ = 22131097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22131101) 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 15 ways as a sum of consecutive naturals, for example, 52610 + ... + 53028.

It is an arithmetic number, because the mean of its divisors is an integer number (1587600).

Almost surely, 2^22131161 is an apocalyptic number.

It is an amenable number.

22131161 is a deficient number, since it is larger than the sum of its proper divisors (3270439).

22131161 is a wasteful number, since it uses less digits than its factorization.

22131161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688.

The product of its digits is 72, while the sum is 17.

The square root of 22131161 is about 4704.3767918822. The cubic root of 22131161 is about 280.7596759830.

Adding to 22131161 its reverse (16113122), we get a palindrome (38244283).

The spelling of 22131161 in words is "twenty-two million, one hundred thirty-one thousand, one hundred sixty-one".