2005431 has 16 divisors (see below), whose sum is σ = 2845440. Its totient is φ = 1252800.

The previous prime is 2005429. The next prime is 2005441. The reversal of 2005431 is 1345002.

It is not a de Polignac number, because 2005431 - 2¹ = 2005429 is a prime.

It is a super-2 number, since 2×2005431² = 8043506991522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2005431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8491 + ... + 8723.

It is an arithmetic number, because the mean of its divisors is an integer number (177840).

2^2005431 is an apocalyptic number.

2005431 is a deficient number, since it is larger than the sum of its proper divisors (840009).

2005431 is a wasteful number, since it uses less digits than its factorization.

2005431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 2005431 is about 1416.1324090635. The cubic root of 2005431 is about 126.1060457699.

The spelling of 2005431 in words is "two million, five thousand, four hundred thirty-one".