2005345131 has 4 divisors (see below), whose sum is σ = 2673793512. Its totient is φ = 1336896752.

The previous prime is 2005345103. The next prime is 2005345141. The reversal of 2005345131 is 1315435002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2005345131 - 2⁷ = 2005345003 is a prime.

It is a super-2 number, since 2×2005345131² = 8042818188850814322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2005345141) 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, 334224186 + ... + 334224191.

It is an arithmetic number, because the mean of its divisors is an integer number (668448378).

Almost surely, 2^2005345131 is an apocalyptic number.

2005345131 is a deficient number, since it is larger than the sum of its proper divisors (668448381).

2005345131 is an equidigital number, since it uses as much as digits as its factorization.

2005345131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668448380.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 2005345131 is about 44781.0800562023. The cubic root of 2005345131 is about 1261.0424586515.

The spelling of 2005345131 in words is "two billion, five million, three hundred forty-five thousand, one hundred thirty-one".