45581321 has 2 divisors, whose sum is σ = 45581322. Its totient is φ = 45581320.

The previous prime is 45581317. The next prime is 45581329. The reversal of 45581321 is 12318554.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33582025 + 11999296 = 5795^2 + 3464^2 .

It is a cyclic number.

It is not a de Polignac number, because 45581321 - 2² = 45581317 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (45581329) 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, 22790660 + 22790661.

It is an arithmetic number, because the mean of its divisors is an integer number (22790661).

Almost surely, 2^45581321 is an apocalyptic number.

It is an amenable number.

45581321 is a deficient number, since it is larger than the sum of its proper divisors (1).

45581321 is an equidigital number, since it uses as much as digits as its factorization.

45581321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4800, while the sum is 29.

The square root of 45581321 is about 6751.3940042039. The cubic root of 45581321 is about 357.2144093058.

Adding to 45581321 its reverse (12318554), we get a palindrome (57899875).

The spelling of 45581321 in words is "forty-five million, five hundred eighty-one thousand, three hundred twenty-one".