22131366 has 8 divisors (see below), whose sum is σ = 44262744. Its totient is φ = 7377120.

The previous prime is 22131289. The next prime is 22131397. The reversal of 22131366 is 66313122.

It is a happy number.

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

22131366 is an admirable number.

It is a super-2 number, since 2×22131366² = 979594722051912, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a Curzon number.

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, 1844275 + ... + 1844286.

It is an arithmetic number, because the mean of its divisors is an integer number (5532843).

Almost surely, 2^22131366 is an apocalyptic number.

22131366 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22131366 is a wasteful number, since it uses less digits than its factorization.

22131366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3688566.

The product of its digits is 1296, while the sum is 24.

The square root of 22131366 is about 4704.3985800525. The cubic root of 22131366 is about 280.7605428686.

Adding to 22131366 its reverse (66313122), we get a palindrome (88444488).

The spelling of 22131366 in words is "twenty-two million, one hundred thirty-one thousand, three hundred sixty-six".