2005450321 has 4 divisors (see below), whose sum is σ = 2291943232. Its totient is φ = 1718957412.

The previous prime is 2005450319. The next prime is 2005450331. The reversal of 2005450321 is 1230545002.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1230545002 = 2 ⋅615272501.

It is a cyclic number.

It is not a de Polignac number, because 2005450321 - 2¹ = 2005450319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2005450292 and 2005450301.

It is not an unprimeable number, because it can be changed into a prime (2005450301) 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, 143246445 + ... + 143246458.

It is an arithmetic number, because the mean of its divisors is an integer number (572985808).

Almost surely, 2^2005450321 is an apocalyptic number.

It is an amenable number.

2005450321 is a deficient number, since it is larger than the sum of its proper divisors (286492911).

2005450321 is an equidigital number, since it uses as much as digits as its factorization.

2005450321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286492910.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 2005450321 is about 44782.2545323480. The cubic root of 2005450321 is about 1261.0645075140.

Adding to 2005450321 its reverse (1230545002), we get a palindrome (3235995323).

The spelling of 2005450321 in words is "two billion, five million, four hundred fifty thousand, three hundred twenty-one".