2251813 has 4 divisors (see below), whose sum is σ = 2255148. Its totient is φ = 2248480.

The previous prime is 2251807. The next prime is 2251819. The reversal of 2251813 is 3181522.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2251807) and next prime (2251819).

It can be written as a sum of positive squares in 2 ways, for example, as 567009 + 1684804 = 753^2 + 1298^2 .

It is a cyclic number.

It is not a de Polignac number, because 2251813 - 2¹³ = 2243621 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 (2251819) 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, 256 + ... + 2137.

It is an arithmetic number, because the mean of its divisors is an integer number (563787).

2^2251813 is an apocalyptic number.

It is an amenable number.

2251813 is a deficient number, since it is larger than the sum of its proper divisors (3335).

2251813 is an equidigital number, since it uses as much as digits as its factorization.

2251813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3334.

The product of its digits is 480, while the sum is 22.

The square root of 2251813 is about 1500.6042116428. The cubic root of 2251813 is about 131.0722558477.

The spelling of 2251813 in words is "two million, two hundred fifty-one thousand, eight hundred thirteen".