22218941 has 2 divisors, whose sum is σ = 22218942. Its totient is φ = 22218940.

The previous prime is 22218919. The next prime is 22218997. The reversal of 22218941 is 14981222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16434916 + 5784025 = 4054^2 + 2405^2 .

It is a cyclic number.

It is not a de Polignac number, because 22218941 - 2⁶ = 22218877 is a prime.

It is a super-2 number, since 2×22218941² = 987362678322962, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22218341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11109470 + 11109471.

It is an arithmetic number, because the mean of its divisors is an integer number (11109471).

Almost surely, 2^22218941 is an apocalyptic number.

It is an amenable number.

22218941 is a deficient number, since it is larger than the sum of its proper divisors (1).

22218941 is an equidigital number, since it uses as much as digits as its factorization.

22218941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 29.

The square root of 22218941 is about 4713.6971688898. The cubic root of 22218941 is about 281.1303836361.

The spelling of 22218941 in words is "twenty-two million, two hundred eighteen thousand, nine hundred forty-one".