2045320321 has 4 divisors (see below), whose sum is σ = 2231258544. Its totient is φ = 1859382100.

The previous prime is 2045320313. The next prime is 2045320391. The reversal of 2045320321 is 1230235402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2045320321 - 2³ = 2045320313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2045320292 and 2045320301.

It is not an unprimeable number, because it can be changed into a prime (2045320391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92969095 + ... + 92969116.

It is an arithmetic number, because the mean of its divisors is an integer number (557814636).

Almost surely, 2^2045320321 is an apocalyptic number.

It is an amenable number.

2045320321 is a deficient number, since it is larger than the sum of its proper divisors (185938223).

2045320321 is a wasteful number, since it uses less digits than its factorization.

2045320321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185938222.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 2045320321 is about 45225.2177551419. The cubic root of 2045320321 is about 1269.3667293536.

Adding to 2045320321 its reverse (1230235402), we get a palindrome (3275555723).

The spelling of 2045320321 in words is "two billion, forty-five million, three hundred twenty thousand, three hundred twenty-one".