2319381 has 8 divisors (see below), whose sum is σ = 3436160. Its totient is φ = 1546236.

The previous prime is 2319379. The next prime is 2319407. The reversal of 2319381 is 1839132.

It is not a de Polignac number, because 2319381 - 2¹ = 2319379 is a prime.

It is a super-2 number, since 2×2319381² = 10759056446322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 85903 = 2319381 / (2 + 3 + 1 + 9 + 3 + 8 + 1).

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2319341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42925 + ... + 42978.

It is an arithmetic number, because the mean of its divisors is an integer number (429520).

2^2319381 is an apocalyptic number.

It is an amenable number.

2319381 is a deficient number, since it is larger than the sum of its proper divisors (1116779).

2319381 is an equidigital number, since it uses as much as digits as its factorization.

2319381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85912 (or 85906 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 2319381 is about 1522.9514109124. The cubic root of 2319381 is about 132.3703442737.

Subtracting from 2319381 its reverse (1839132), we obtain a square (480249 = 693²).

The spelling of 2319381 in words is "two million, three hundred nineteen thousand, three hundred eighty-one".