2265813 has 20 divisors (see below), whose sum is σ = 3693888. Its totient is φ = 1372680.

The previous prime is 2265797. The next prime is 2265841. The reversal of 2265813 is 3185622.

2265813 is a `hidden beast` number, since 2 + 2 + 658 + 1 + 3 = 666.

It is not a de Polignac number, because 2265813 - 2⁴ = 2265797 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2265413) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 381 + ... + 2162.

2^2265813 is an apocalyptic number.

It is an amenable number.

2265813 is a deficient number, since it is larger than the sum of its proper divisors (1428075).

2265813 is a wasteful number, since it uses less digits than its factorization.

2265813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566 (or 2557 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2265813 is about 1505.2617712544. The cubic root of 2265813 is about 131.3433295377.

The spelling of 2265813 in words is "two million, two hundred sixty-five thousand, eight hundred thirteen".