18229241 has 2 divisors, whose sum is σ = 18229242. Its totient is φ = 18229240.

The previous prime is 18229229. The next prime is 18229243. The reversal of 18229241 is 14292281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16777216 + 1452025 = 4096^2 + 1205^2 .

It is a cyclic number.

It is not a de Polignac number, because 18229241 - 2⁶ = 18229177 is a prime.

It is a Sophie Germain prime.

Together with 18229243, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18229243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9114620 + 9114621.

It is an arithmetic number, because the mean of its divisors is an integer number (9114621).

Almost surely, 2^18229241 is an apocalyptic number.

It is an amenable number.

18229241 is a deficient number, since it is larger than the sum of its proper divisors (1).

18229241 is an equidigital number, since it uses as much as digits as its factorization.

18229241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 29.

The square root of 18229241 is about 4269.5715241696. The cubic root of 18229241 is about 263.1820076284.

The spelling of 18229241 in words is "eighteen million, two hundred twenty-nine thousand, two hundred forty-one".