73422221 has 2 divisors, whose sum is σ = 73422222. Its totient is φ = 73422220.

The previous prime is 73422197. The next prime is 73422259. The reversal of 73422221 is 12222437.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61936900 + 11485321 = 7870^2 + 3389^2 .

It is a cyclic number.

It is not a de Polignac number, because 73422221 - 2¹⁰ = 73421197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73422121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36711110 + 36711111.

It is an arithmetic number, because the mean of its divisors is an integer number (36711111).

Almost surely, 2^73422221 is an apocalyptic number.

It is an amenable number.

73422221 is a deficient number, since it is larger than the sum of its proper divisors (1).

73422221 is an equidigital number, since it uses as much as digits as its factorization.

73422221 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 73422221 is about 8568.6767356459. The cubic root of 73422221 is about 418.7381267592.

Adding to 73422221 its reverse (12222437), we get a palindrome (85644658).

The spelling of 73422221 in words is "seventy-three million, four hundred twenty-two thousand, two hundred twenty-one".