22212389 has 2 divisors, whose sum is σ = 22212390. Its totient is φ = 22212388.

The previous prime is 22212373. The next prime is 22212391. The reversal of 22212389 is 98321222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21548164 + 664225 = 4642^2 + 815^2 .

It is a cyclic number.

It is not a de Polignac number, because 22212389 - 2⁴ = 22212373 is a prime.

Together with 22212391, 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 (22212329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106194 + 11106195.

It is an arithmetic number, because the mean of its divisors is an integer number (11106195).

Almost surely, 2^22212389 is an apocalyptic number.

It is an amenable number.

22212389 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212389 is an equidigital number, since it uses as much as digits as its factorization.

22212389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 22212389 is about 4713.0021217903. The cubic root of 22212389 is about 281.1027473451.

It can be divided in two parts, 22212 and 389, that multiplied together give a palindrome (8640468).

The spelling of 22212389 in words is "twenty-two million, two hundred twelve thousand, three hundred eighty-nine".