218453413 has 2 divisors, whose sum is σ = 218453414. Its totient is φ = 218453412.

The previous prime is 218453401. The next prime is 218453423. The reversal of 218453413 is 314354812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196616484 + 21836929 = 14022^2 + 4673^2 .

It is a cyclic number.

It is not a de Polignac number, because 218453413 - 2⁵ = 218453381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218453423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109226706 + 109226707.

It is an arithmetic number, because the mean of its divisors is an integer number (109226707).

Almost surely, 2^218453413 is an apocalyptic number.

It is an amenable number.

218453413 is a deficient number, since it is larger than the sum of its proper divisors (1).

218453413 is an equidigital number, since it uses as much as digits as its factorization.

218453413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The square root of 218453413 is about 14780.1695863072. The cubic root of 218453413 is about 602.2631316960.

The spelling of 218453413 in words is "two hundred eighteen million, four hundred fifty-three thousand, four hundred thirteen".