2045340321 has 4 divisors (see below), whose sum is σ = 2727120432. Its totient is φ = 1363560212.

The previous prime is 2045340317. The next prime is 2045340347. The reversal of 2045340321 is 1230435402.

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 2045340321 - 2² = 2045340317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2045340291 and 2045340300.

It is not an unprimeable number, because it can be changed into a prime (2045340361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340890051 + ... + 340890056.

It is an arithmetic number, because the mean of its divisors is an integer number (681780108).

Almost surely, 2^2045340321 is an apocalyptic number.

It is an amenable number.

2045340321 is a deficient number, since it is larger than the sum of its proper divisors (681780111).

2045340321 is an equidigital number, since it uses as much as digits as its factorization.

2045340321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681780110.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 2045340321 is about 45225.4388701757. The cubic root of 2045340321 is about 1269.3708668069.

Adding to 2045340321 its reverse (1230435402), we get a palindrome (3275775723).

The spelling of 2045340321 in words is "two billion, forty-five million, three hundred forty thousand, three hundred twenty-one".