22218743 has 2 divisors, whose sum is σ = 22218744. Its totient is φ = 22218742.

The previous prime is 22218737. The next prime is 22218767. The reversal of 22218743 is 34781222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22218743 - 2¹⁰ = 22217719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22208743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11109371 + 11109372.

It is an arithmetic number, because the mean of its divisors is an integer number (11109372).

Almost surely, 2^22218743 is an apocalyptic number.

22218743 is a deficient number, since it is larger than the sum of its proper divisors (1).

22218743 is an equidigital number, since it uses as much as digits as its factorization.

22218743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 29.

The square root of 22218743 is about 4713.6761662210. The cubic root of 22218743 is about 281.1295485531.

Adding to 22218743 its reverse (34781222), we get a palindrome (56999965).

The spelling of 22218743 in words is "twenty-two million, two hundred eighteen thousand, seven hundred forty-three".