18227233 has 2 divisors, whose sum is σ = 18227234. Its totient is φ = 18227232.

The previous prime is 18227219. The next prime is 18227249. The reversal of 18227233 is 33272281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10093329 + 8133904 = 3177^2 + 2852^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18227233 is a prime.

It is equal to p_1164835 and since 18227233 and 1164835 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (18227203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9113616 + 9113617.

It is an arithmetic number, because the mean of its divisors is an integer number (9113617).

Almost surely, 2^18227233 is an apocalyptic number.

It is an amenable number.

18227233 is a deficient number, since it is larger than the sum of its proper divisors (1).

18227233 is an equidigital number, since it uses as much as digits as its factorization.

18227233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 28.

The square root of 18227233 is about 4269.3363652914. The cubic root of 18227233 is about 263.1723438712.

The spelling of 18227233 in words is "eighteen million, two hundred twenty-seven thousand, two hundred thirty-three".