22143389 has 2 divisors, whose sum is σ = 22143390. Its totient is φ = 22143388.

The previous prime is 22143383. The next prime is 22143397. The reversal of 22143389 is 98334122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20839225 + 1304164 = 4565^2 + 1142^2 .

It is a cyclic number.

It is not a de Polignac number, because 22143389 - 2⁸ = 22143133 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22143383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11071694 + 11071695.

It is an arithmetic number, because the mean of its divisors is an integer number (11071695).

Almost surely, 2^22143389 is an apocalyptic number.

It is an amenable number.

22143389 is a deficient number, since it is larger than the sum of its proper divisors (1).

22143389 is an equidigital number, since it uses as much as digits as its factorization.

22143389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 22143389 is about 4705.6762532074. The cubic root of 22143389 is about 280.8113752924.

The spelling of 22143389 in words is "twenty-two million, one hundred forty-three thousand, three hundred eighty-nine".