73222321 has 2 divisors, whose sum is σ = 73222322. Its totient is φ = 73222320.

The previous prime is 73222313. The next prime is 73222327. The reversal of 73222321 is 12322237.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63680400 + 9541921 = 7980^2 + 3089^2 .

It is an emirp because it is prime and its reverse (12322237) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73222321 - 2³ = 73222313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 73222292 and 73222301.

It is not a weakly prime, because it can be changed into another prime (73222327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36611160 + 36611161.

It is an arithmetic number, because the mean of its divisors is an integer number (36611161).

Almost surely, 2^73222321 is an apocalyptic number.

It is an amenable number.

73222321 is a deficient number, since it is larger than the sum of its proper divisors (1).

73222321 is an equidigital number, since it uses as much as digits as its factorization.

73222321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 22.

The square root of 73222321 is about 8557.0042070809. The cubic root of 73222321 is about 418.3577612898.

Adding to 73222321 its reverse (12322237), we get a palindrome (85544558).

The spelling of 73222321 in words is "seventy-three million, two hundred twenty-two thousand, three hundred twenty-one".