22138243 has 2 divisors, whose sum is σ = 22138244. Its totient is φ = 22138242.

The previous prime is 22138229. The next prime is 22138279. The reversal of 22138243 is 34283122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22138243 is a prime.

It is not a weakly prime, because it can be changed into another prime (22138283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11069121 + 11069122.

It is an arithmetic number, because the mean of its divisors is an integer number (11069122).

Almost surely, 2^22138243 is an apocalyptic number.

22138243 is a deficient number, since it is larger than the sum of its proper divisors (1).

22138243 is an equidigital number, since it uses as much as digits as its factorization.

22138243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 25.

The square root of 22138243 is about 4705.1294349890. The cubic root of 22138243 is about 280.7896206083.

The spelling of 22138243 in words is "twenty-two million, one hundred thirty-eight thousand, two hundred forty-three".