18250217 has 2 divisors, whose sum is σ = 18250218. Its totient is φ = 18250216.

The previous prime is 18250187. The next prime is 18250237. The reversal of 18250217 is 71205281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10471696 + 7778521 = 3236^2 + 2789^2 .

It is a cyclic number.

It is not a de Polignac number, because 18250217 - 2⁶ = 18250153 is a prime.

It is not a weakly prime, because it can be changed into another prime (18250237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9125108 + 9125109.

It is an arithmetic number, because the mean of its divisors is an integer number (9125109).

Almost surely, 2^18250217 is an apocalyptic number.

It is an amenable number.

18250217 is a deficient number, since it is larger than the sum of its proper divisors (1).

18250217 is an equidigital number, since it uses as much as digits as its factorization.

18250217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 18250217 is about 4272.0272705122. The cubic root of 18250217 is about 263.2829149143.

Adding to 18250217 its reverse (71205281), we get a palindrome (89455498).

The spelling of 18250217 in words is "eighteen million, two hundred fifty thousand, two hundred seventeen".