218342029 has 2 divisors, whose sum is σ = 218342030. Its totient is φ = 218342028.

The previous prime is 218342027. The next prime is 218342057. The reversal of 218342029 is 920243812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132779529 + 85562500 = 11523^2 + 9250^2 .

It is a cyclic number.

It is not a de Polignac number, because 218342029 - 2¹ = 218342027 is a prime.

Together with 218342027, 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 (218342027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109171014 + 109171015.

It is an arithmetic number, because the mean of its divisors is an integer number (109171015).

Almost surely, 2^218342029 is an apocalyptic number.

It is an amenable number.

218342029 is a deficient number, since it is larger than the sum of its proper divisors (1).

218342029 is an equidigital number, since it uses as much as digits as its factorization.

218342029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 218342029 is about 14776.4010841612. The cubic root of 218342029 is about 602.1607545954.

The spelling of 218342029 in words is "two hundred eighteen million, three hundred forty-two thousand, twenty-nine".