73218601 has 2 divisors, whose sum is σ = 73218602. Its totient is φ = 73218600.

The previous prime is 73218589. The next prime is 73218611. The reversal of 73218601 is 10681237.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58125376 + 15093225 = 7624^2 + 3885^2 .

It is a cyclic number.

It is not a de Polignac number, because 73218601 - 2⁵ = 73218569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73218601.

It is not a weakly prime, because it can be changed into another prime (73218611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36609300 + 36609301.

It is an arithmetic number, because the mean of its divisors is an integer number (36609301).

Almost surely, 2^73218601 is an apocalyptic number.

It is an amenable number.

73218601 is a deficient number, since it is larger than the sum of its proper divisors (1).

73218601 is an equidigital number, since it uses as much as digits as its factorization.

73218601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 73218601 is about 8556.7868385276. The cubic root of 73218601 is about 418.3506763955.

Adding to 73218601 its reverse (10681237), we get a palindrome (83899838).

The spelling of 73218601 in words is "seventy-three million, two hundred eighteen thousand, six hundred one".