18227317 has 2 divisors, whose sum is σ = 18227318. Its totient is φ = 18227316.

The previous prime is 18227311. The next prime is 18227323. The reversal of 18227317 is 71372281.

It is a balanced prime because it is at equal distance from previous prime (18227311) and next prime (18227323).

It can be written as a sum of positive squares in only one way, i.e., 18198756 + 28561 = 4266^2 + 169^2 .

It is a cyclic number.

It is not a de Polignac number, because 18227317 - 2³ = 18227309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18227311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9113658 + 9113659.

It is an arithmetic number, because the mean of its divisors is an integer number (9113659).

Almost surely, 2^18227317 is an apocalyptic number.

It is an amenable number.

18227317 is a deficient number, since it is larger than the sum of its proper divisors (1).

18227317 is an equidigital number, since it uses as much as digits as its factorization.

18227317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704, while the sum is 31.

The square root of 18227317 is about 4269.3462028746. The cubic root of 18227317 is about 263.1727481462.

Adding to 18227317 its reverse (71372281), we get a palindrome (89599598).

The spelling of 18227317 in words is "eighteen million, two hundred twenty-seven thousand, three hundred seventeen".