18223241 has 2 divisors, whose sum is σ = 18223242. Its totient is φ = 18223240.

The previous prime is 18223211. The next prime is 18223259. The reversal of 18223241 is 14232281.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16321600 + 1901641 = 4040^2 + 1379^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18223241 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18223211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9111620 + 9111621.

It is an arithmetic number, because the mean of its divisors is an integer number (9111621).

Almost surely, 2^18223241 is an apocalyptic number.

It is an amenable number.

18223241 is a deficient number, since it is larger than the sum of its proper divisors (1).

18223241 is an equidigital number, since it uses as much as digits as its factorization.

18223241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 23.

The square root of 18223241 is about 4268.8688197226. The cubic root of 18223241 is about 263.1531297516.

The spelling of 18223241 in words is "eighteen million, two hundred twenty-three thousand, two hundred forty-one".