2225813 has 4 divisors (see below), whose sum is σ = 2228940. Its totient is φ = 2222688.

The previous prime is 2225791. The next prime is 2225819. The reversal of 2225813 is 3185222.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1620529 + 605284 = 1273^2 + 778^2 .

It is a cyclic number.

It is not a de Polignac number, because 2225813 - 2⁶ = 2225749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2225819) 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, 83 + ... + 2111.

It is an arithmetic number, because the mean of its divisors is an integer number (557235).

2^2225813 is an apocalyptic number.

It is an amenable number.

2225813 is a deficient number, since it is larger than the sum of its proper divisors (3127).

2225813 is a wasteful number, since it uses less digits than its factorization.

2225813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3126.

The product of its digits is 960, while the sum is 23.

The square root of 2225813 is about 1491.9158823473. The cubic root of 2225813 is about 130.5658373138.

The spelling of 2225813 in words is "two million, two hundred twenty-five thousand, eight hundred thirteen".