73218263 has 2 divisors, whose sum is σ = 73218264. Its totient is φ = 73218262.

The previous prime is 73218247. The next prime is 73218287. The reversal of 73218263 is 36281237.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73218263 - 2⁴ = 73218247 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73218163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36609131 + 36609132.

It is an arithmetic number, because the mean of its divisors is an integer number (36609132).

Almost surely, 2^73218263 is an apocalyptic number.

73218263 is a deficient number, since it is larger than the sum of its proper divisors (1).

73218263 is an equidigital number, since it uses as much as digits as its factorization.

73218263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 32.

The square root of 73218263 is about 8556.7670881005. The cubic root of 73218263 is about 418.3500326485.

The spelling of 73218263 in words is "seventy-three million, two hundred eighteen thousand, two hundred sixty-three".