2005531317 has 12 divisors (see below), whose sum is σ = 2905634784. Its totient is φ = 1332979560.

The previous prime is 2005531291. The next prime is 2005531369. The reversal of 2005531317 is 7131355002.

It is not a de Polignac number, because 2005531317 - 2¹⁵ = 2005498549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005531397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333633 + ... + 339590.

It is an arithmetic number, because the mean of its divisors is an integer number (242136232).

Almost surely, 2^2005531317 is an apocalyptic number.

It is an amenable number.

2005531317 is a deficient number, since it is larger than the sum of its proper divisors (900103467).

2005531317 is a wasteful number, since it uses less digits than its factorization.

2005531317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673560 (or 673557 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 27.

The square root of 2005531317 is about 44783.1588546409. The cubic root of 2005531317 is about 1261.0814845498.

Adding to 2005531317 its reverse (7131355002), we get a palindrome (9136886319).

The spelling of 2005531317 in words is "two billion, five million, five hundred thirty-one thousand, three hundred seventeen".