73380221 has 2 divisors, whose sum is σ = 73380222. Its totient is φ = 73380220.

The previous prime is 73380173. The next prime is 73380227. The reversal of 73380221 is 12208337.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49857721 + 23522500 = 7061^2 + 4850^2 .

It is a cyclic number.

It is not a de Polignac number, because 73380221 - 2¹⁴ = 73363837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73380227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36690110 + 36690111.

It is an arithmetic number, because the mean of its divisors is an integer number (36690111).

Almost surely, 2^73380221 is an apocalyptic number.

It is an amenable number.

73380221 is a deficient number, since it is larger than the sum of its proper divisors (1).

73380221 is an equidigital number, since it uses as much as digits as its factorization.

73380221 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 26.

The square root of 73380221 is about 8566.2255982434. The cubic root of 73380221 is about 418.6582673942.

Adding to 73380221 its reverse (12208337), we get a palindrome (85588558).

The spelling of 73380221 in words is "seventy-three million, three hundred eighty thousand, two hundred twenty-one".