73218319 has 2 divisors, whose sum is σ = 73218320. Its totient is φ = 73218318.

The previous prime is 73218317. The next prime is 73218329. The reversal of 73218319 is 91381237.

It is a weak prime.

It is an emirp because it is prime and its reverse (91381237) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73218319 - 2¹ = 73218317 is a prime.

It is a super-2 number, since 2×73218319² = 10721844474371522, which contains 22 as substring.

Together with 73218317, 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 (73218317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36609159 + 36609160.

It is an arithmetic number, because the mean of its divisors is an integer number (36609160).

Almost surely, 2^73218319 is an apocalyptic number.

73218319 is a deficient number, since it is larger than the sum of its proper divisors (1).

73218319 is an equidigital number, since it uses as much as digits as its factorization.

73218319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 73218319 is about 8556.7703603638. The cubic root of 73218319 is about 418.3501393050.

It can be divided in two parts, 73218 and 319, that added together give a palindrome (73537).

The spelling of 73218319 in words is "seventy-three million, two hundred eighteen thousand, three hundred nineteen".