2251844813 has 4 divisors (see below), whose sum is σ = 2273707488. Its totient is φ = 2229982140.

The previous prime is 2251844807. The next prime is 2251844821. The reversal of 2251844813 is 3184481522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2251844813 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251847813) 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, 10931183 + ... + 10931388.

It is an arithmetic number, because the mean of its divisors is an integer number (568426872).

Almost surely, 2^2251844813 is an apocalyptic number.

It is an amenable number.

2251844813 is a deficient number, since it is larger than the sum of its proper divisors (21862675).

2251844813 is a wasteful number, since it uses less digits than its factorization.

2251844813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21862674.

The product of its digits is 61440, while the sum is 38.

The square root of 2251844813 is about 47453.6069545825. The cubic root of 2251844813 is about 1310.7287309580.

The spelling of 2251844813 in words is "two billion, two hundred fifty-one million, eight hundred forty-four thousand, eight hundred thirteen".