238816213 has 2 divisors, whose sum is σ = 238816214. Its totient is φ = 238816212.

The previous prime is 238816211. The next prime is 238816223. The reversal of 238816213 is 312618832.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168558289 + 70257924 = 12983^2 + 8382^2 .

It is a cyclic number.

It is not a de Polignac number, because 238816213 - 2¹ = 238816211 is a prime.

It is a super-2 number, since 2×238816213² = 114066367183322738, which contains 22 as substring.

Together with 238816211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238816211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119408106 + 119408107.

It is an arithmetic number, because the mean of its divisors is an integer number (119408107).

Almost surely, 2^238816213 is an apocalyptic number.

It is an amenable number.

238816213 is a deficient number, since it is larger than the sum of its proper divisors (1).

238816213 is an equidigital number, since it uses as much as digits as its factorization.

238816213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 34.

The square root of 238816213 is about 15453.6795941937. The cubic root of 238816213 is about 620.4230662609.

The spelling of 238816213 in words is "two hundred thirty-eight million, eight hundred sixteen thousand, two hundred thirteen".