22131131 has 8 divisors (see below), whose sum is σ = 24369984. Its totient is φ = 19930120.

The previous prime is 22131113. The next prime is 22131133. The reversal of 22131131 is 13113122.

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

It is a cyclic number.

It is not a de Polignac number, because 22131131 - 2²² = 17936827 is a prime.

It is a super-2 number, since 2×22131131² = 979573918678322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22131133) 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, 8225 + ... + 10578.

It is an arithmetic number, because the mean of its divisors is an integer number (3046248).

Almost surely, 2^22131131 is an apocalyptic number.

22131131 is a deficient number, since it is larger than the sum of its proper divisors (2238853).

22131131 is a wasteful number, since it uses less digits than its factorization.

22131131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18921.

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

The square root of 22131131 is about 4704.3736033610. The cubic root of 22131131 is about 280.7595491212.

Adding to 22131131 its reverse (13113122), we get a palindrome (35244253).

Subtracting from 22131131 its reverse (13113122), we obtain a square (9018009 = 3003²).

It can be divided in two parts, 22 and 131131, that multiplied together give a palindrome (2884882).

The spelling of 22131131 in words is "twenty-two million, one hundred thirty-one thousand, one hundred thirty-one".