2005431323 has 32 divisors (see below), whose sum is σ = 2497904640. Its totient is φ = 1571179680.

The previous prime is 2005431293. The next prime is 2005431347. The reversal of 2005431323 is 3231345002.

It is not a de Polignac number, because 2005431323 - 2⁸ = 2005431067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2005431383) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2073386 + ... + 2074352.

It is an arithmetic number, because the mean of its divisors is an integer number (78059520).

Almost surely, 2^2005431323 is an apocalyptic number.

2005431323 is a deficient number, since it is larger than the sum of its proper divisors (492473317).

2005431323 is a wasteful number, since it uses less digits than its factorization.

2005431323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 2005431323 is about 44782.0424165759. The cubic root of 2005431323 is about 1261.0605254027.

Adding to 2005431323 its reverse (3231345002), we get a palindrome (5236776325).

The spelling of 2005431323 in words is "two billion, five million, four hundred thirty-one thousand, three hundred twenty-three".