74222321 has 2 divisors, whose sum is σ = 74222322. Its totient is φ = 74222320.

The previous prime is 74222297. The next prime is 74222329. The reversal of 74222321 is 12322247.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74218225 + 4096 = 8615^2 + 64^2 .

It is a cyclic number.

It is not a de Polignac number, because 74222321 - 2¹⁸ = 73960177 is a prime.

It is not a weakly prime, because it can be changed into another prime (74222329) 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, 37111160 + 37111161.

It is an arithmetic number, because the mean of its divisors is an integer number (37111161).

Almost surely, 2^74222321 is an apocalyptic number.

It is an amenable number.

74222321 is a deficient number, since it is larger than the sum of its proper divisors (1).

74222321 is an equidigital number, since it uses as much as digits as its factorization.

74222321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 23.

The square root of 74222321 is about 8615.2377216186. The cubic root of 74222321 is about 420.2536657357.

Adding to 74222321 its reverse (12322247), we get a palindrome (86544568).

The spelling of 74222321 in words is "seventy-four million, two hundred twenty-two thousand, three hundred twenty-one".