2045453321 has 2 divisors, whose sum is σ = 2045453322. Its totient is φ = 2045453320.

The previous prime is 2045453261. The next prime is 2045453323. The reversal of 2045453321 is 1233545402.

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., 1329623296 + 715830025 = 36464^2 + 26755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2045453321 is a prime.

Together with 2045453323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2045453323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1022726660 + 1022726661.

It is an arithmetic number, because the mean of its divisors is an integer number (1022726661).

Almost surely, 2^2045453321 is an apocalyptic number.

It is an amenable number.

2045453321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2045453321 is an equidigital number, since it uses as much as digits as its factorization.

2045453321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 2045453321 is about 45226.6881498082. The cubic root of 2045453321 is about 1269.3942429112.

Adding to 2045453321 its reverse (1233545402), we get a palindrome (3278998723).

The spelling of 2045453321 in words is "two billion, forty-five million, four hundred fifty-three thousand, three hundred twenty-one".