22131316 has 12 divisors (see below), whose sum is σ = 39460932. Its totient is φ = 10856768.

The previous prime is 22131289. The next prime is 22131397. The reversal of 22131316 is 61313122.

It can be written as a sum of positive squares in 2 ways, for example, as 20160100 + 1971216 = 4490^2 + 1404^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22131293 and 22131302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51985 + ... + 52408.

It is an arithmetic number, because the mean of its divisors is an integer number (3288411).

Almost surely, 2^22131316 is an apocalyptic number.

It is an amenable number.

22131316 is a deficient number, since it is larger than the sum of its proper divisors (17329616).

22131316 is a wasteful number, since it uses less digits than its factorization.

22131316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104450 (or 104448 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 22131316 is about 4704.3932658739. The cubic root of 22131316 is about 280.7603314336.

Adding to 22131316 its reverse (61313122), we get a palindrome (83444438).

The spelling of 22131316 in words is "twenty-two million, one hundred thirty-one thousand, three hundred sixteen".