2381813 has 16 divisors (see below), whose sum is σ = 2868096. Its totient is φ = 1935360.

The previous prime is 2381807. The next prime is 2381839. The reversal of 2381813 is 3181832.

It is not a de Polignac number, because 2381813 - 2⁶ = 2381749 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2381893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12245 + ... + 12437.

It is an arithmetic number, because the mean of its divisors is an integer number (179256).

2^2381813 is an apocalyptic number.

It is an amenable number.

2381813 is a deficient number, since it is larger than the sum of its proper divisors (486283).

2381813 is a wasteful number, since it uses less digits than its factorization.

2381813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284.

The product of its digits is 1152, while the sum is 26.

The square root of 2381813 is about 1543.3123468696. The cubic root of 2381813 is about 133.5475383263.

The spelling of 2381813 in words is "two million, three hundred eighty-one thousand, eight hundred thirteen".