2805231 has 24 divisors (see below), whose sum is σ = 4427136. Its totient is φ = 1566240.

The previous prime is 2805227. The next prime is 2805233. The reversal of 2805231 is 1325082.

It is not a de Polignac number, because 2805231 - 2² = 2805227 is a prime.

It is a super-2 number, since 2×2805231² = 15738641926722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 2805198 and 2805207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5326 + ... + 5828.

It is an arithmetic number, because the mean of its divisors is an integer number (184464).

2^2805231 is an apocalyptic number.

2805231 is a deficient number, since it is larger than the sum of its proper divisors (1621905).

2805231 is a wasteful number, since it uses less digits than its factorization.

2805231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543 (or 530 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2805231 is about 1674.8823839303. The cubic root of 2805231 is about 141.0336924665.

The spelling of 2805231 in words is "two million, eight hundred five thousand, two hundred thirty-one".