73218611 has 2 divisors, whose sum is σ = 73218612. Its totient is φ = 73218610.

The previous prime is 73218601. The next prime is 73218641. The reversal of 73218611 is 11681237.

It is a weak prime.

It is an emirp because it is prime and its reverse (11681237) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73218611 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (73218601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36609305 + 36609306.

It is an arithmetic number, because the mean of its divisors is an integer number (36609306).

Almost surely, 2^73218611 is an apocalyptic number.

73218611 is a deficient number, since it is larger than the sum of its proper divisors (1).

73218611 is an equidigital number, since it uses as much as digits as its factorization.

73218611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 29.

The square root of 73218611 is about 8556.7874228591. The cubic root of 73218611 is about 418.3506954412.

Adding to 73218611 its reverse (11681237), we get a palindrome (84899848).

The spelling of 73218611 in words is "seventy-three million, two hundred eighteen thousand, six hundred eleven".