22662181 has 2 divisors, whose sum is σ = 22662182. Its totient is φ = 22662180.

The previous prime is 22662179. The next prime is 22662191. The reversal of 22662181 is 18126622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14630625 + 8031556 = 3825^2 + 2834^2 .

It is a cyclic number.

It is not a de Polignac number, because 22662181 - 2¹ = 22662179 is a prime.

It is a super-2 number, since 2×22662181² = 1027148895353522, which contains 22 as substring.

Together with 22662179, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22662121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11331090 + 11331091.

It is an arithmetic number, because the mean of its divisors is an integer number (11331091).

Almost surely, 2^22662181 is an apocalyptic number.

It is an amenable number.

22662181 is a deficient number, since it is larger than the sum of its proper divisors (1).

22662181 is an equidigital number, since it uses as much as digits as its factorization.

22662181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 28.

The square root of 22662181 is about 4760.4811731589. The cubic root of 22662181 is about 282.9874883654.

The spelling of 22662181 in words is "twenty-two million, six hundred sixty-two thousand, one hundred eighty-one".