243213119 has 2 divisors, whose sum is σ = 243213120. Its totient is φ = 243213118.

The previous prime is 243213079. The next prime is 243213121. The reversal of 243213119 is 911312342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243213119 - 2²⁰ = 242164543 is a prime.

It is a super-2 number, since 2×243213119² = 118305242507416322, which contains 22 as substring.

Together with 243213121, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243213199) 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, 121606559 + 121606560.

It is an arithmetic number, because the mean of its divisors is an integer number (121606560).

Almost surely, 2^243213119 is an apocalyptic number.

243213119 is a deficient number, since it is larger than the sum of its proper divisors (1).

243213119 is an equidigital number, since it uses as much as digits as its factorization.

243213119 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 243213119 is about 15595.2915650846. The cubic root of 243213119 is about 624.2075238084.

It can be divided in two parts, 2432 and 13119, that added together give a palindrome (15551).

The spelling of 243213119 in words is "two hundred forty-three million, two hundred thirteen thousand, one hundred nineteen".