218841023 has 2 divisors, whose sum is σ = 218841024. Its totient is φ = 218841022.

The previous prime is 218840953. The next prime is 218841041. The reversal of 218841023 is 320148812.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218841023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218849023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109420511 + 109420512.

It is an arithmetic number, because the mean of its divisors is an integer number (109420512).

Almost surely, 2^218841023 is an apocalyptic number.

218841023 is a deficient number, since it is larger than the sum of its proper divisors (1).

218841023 is an equidigital number, since it uses as much as digits as its factorization.

218841023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 218841023 is about 14793.2762767414. The cubic root of 218841023 is about 602.6191271707.

Adding to 218841023 its reverse (320148812), we get a palindrome (538989835).

The spelling of 218841023 in words is "two hundred eighteen million, eight hundred forty-one thousand, twenty-three".