218234329 has 2 divisors, whose sum is σ = 218234330. Its totient is φ = 218234328.

The previous prime is 218234299. The next prime is 218234339. The reversal of 218234329 is 923432812.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214681104 + 3553225 = 14652^2 + 1885^2 .

It is a cyclic number.

It is not a de Polignac number, because 218234329 - 2¹³ = 218226137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 218234294 and 218234303.

It is not a weakly prime, because it can be changed into another prime (218234339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109117164 + 109117165.

It is an arithmetic number, because the mean of its divisors is an integer number (109117165).

Almost surely, 2^218234329 is an apocalyptic number.

It is an amenable number.

218234329 is a deficient number, since it is larger than the sum of its proper divisors (1).

218234329 is an equidigital number, since it uses as much as digits as its factorization.

218234329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 34.

The square root of 218234329 is about 14772.7563101813. The cubic root of 218234329 is about 602.0617304792.

The spelling of 218234329 in words is "two hundred eighteen million, two hundred thirty-four thousand, three hundred twenty-nine".