22641181 has 2 divisors, whose sum is σ = 22641182. Its totient is φ = 22641180.

The previous prime is 22641133. The next prime is 22641197. The reversal of 22641181 is 18114622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16736281 + 5904900 = 4091^2 + 2430^2 .

It is a cyclic number.

It is not a de Polignac number, because 22641181 - 2¹⁷ = 22510109 is a prime.

It is a super-2 number, since 2×22641181² = 1025246154149522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22641121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11320590 + 11320591.

It is an arithmetic number, because the mean of its divisors is an integer number (11320591).

Almost surely, 2^22641181 is an apocalyptic number.

It is an amenable number.

22641181 is a deficient number, since it is larger than the sum of its proper divisors (1).

22641181 is an equidigital number, since it uses as much as digits as its factorization.

22641181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 25.

The square root of 22641181 is about 4758.2750025613. The cubic root of 22641181 is about 282.9000508586.

It can be divided in two parts, 22641 and 181, that added together give a palindrome (22822).

The spelling of 22641181 in words is "twenty-two million, six hundred forty-one thousand, one hundred eighty-one".