2045432321 has 8 divisors (see below), whose sum is σ = 2118541800. Its totient is φ = 1972494720.

The previous prime is 2045432317. The next prime is 2045432357. The reversal of 2045432321 is 1232345402.

It can be written as a sum of positive squares in 4 ways, for example, as 985018225 + 1060414096 = 31385^2 + 32564^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2045432321 - 2² = 2045432317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2045435321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18500 + ... + 66581.

It is an arithmetic number, because the mean of its divisors is an integer number (264817725).

Almost surely, 2^2045432321 is an apocalyptic number.

It is an amenable number.

2045432321 is a deficient number, since it is larger than the sum of its proper divisors (73109479).

2045432321 is an equidigital number, since it uses as much as digits as its factorization.

2045432321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85939.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 2045432321 is about 45226.4559854075. The cubic root of 2045432321 is about 1269.3898987446.

Adding to 2045432321 its reverse (1232345402), we get a palindrome (3277777723).

The spelling of 2045432321 in words is "two billion, forty-five million, four hundred thirty-two thousand, three hundred twenty-one".