22445131 has 4 divisors (see below), whose sum is σ = 22464792. Its totient is φ = 22425472.

The previous prime is 22445113. The next prime is 22445141. The reversal of 22445131 is 13154422.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22445131 is a prime.

It is a super-2 number, since 2×22445131² = 1007567811214322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22445141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8005 + ... + 10438.

It is an arithmetic number, because the mean of its divisors is an integer number (5616198).

Almost surely, 2^22445131 is an apocalyptic number.

22445131 is a deficient number, since it is larger than the sum of its proper divisors (19661).

22445131 is a wasteful number, since it uses less digits than its factorization.

22445131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19660.

The product of its digits is 960, while the sum is 22.

The square root of 22445131 is about 4737.6292594503. The cubic root of 22445131 is about 282.0811387331.

Adding to 22445131 its reverse (13154422), we get a palindrome (35599553).

The spelling of 22445131 in words is "twenty-two million, four hundred forty-five thousand, one hundred thirty-one".