445313321 has 2 divisors, whose sum is σ = 445313322. Its totient is φ = 445313320.

The previous prime is 445313311. The next prime is 445313353. The reversal of 445313321 is 123313544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 395413225 + 49900096 = 19885^2 + 7064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445313321 is a prime.

It is not a weakly prime, because it can be changed into another prime (445313311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222656660 + 222656661.

It is an arithmetic number, because the mean of its divisors is an integer number (222656661).

Almost surely, 2^445313321 is an apocalyptic number.

It is an amenable number.

445313321 is a deficient number, since it is larger than the sum of its proper divisors (1).

445313321 is an equidigital number, since it uses as much as digits as its factorization.

445313321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 26.

The square root of 445313321 is about 21102.4482228958. The cubic root of 445313321 is about 763.6398123302.

Adding to 445313321 its reverse (123313544), we get a palindrome (568626865).

The spelling of 445313321 in words is "four hundred forty-five million, three hundred thirteen thousand, three hundred twenty-one".