2239381 has 4 divisors (see below), whose sum is σ = 2243052. Its totient is φ = 2235712.

The previous prime is 2239373. The next prime is 2239387. The reversal of 2239381 is 1839322.

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

It can be written as a sum of positive squares in 2 ways, for example, as 194481 + 2044900 = 441^2 + 1430^2 .

It is a cyclic number.

It is not a de Polignac number, because 2239381 - 2³ = 2239373 is a prime.

It is a super-2 number, since 2×2239381² = 10029654526322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2239387) 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, 676 + ... + 2221.

It is an arithmetic number, because the mean of its divisors is an integer number (560763).

2^2239381 is an apocalyptic number.

It is an amenable number.

2239381 is a deficient number, since it is larger than the sum of its proper divisors (3671).

2239381 is an equidigital number, since it uses as much as digits as its factorization.

2239381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3670.

The product of its digits is 2592, while the sum is 28.

The square root of 2239381 is about 1496.4561470354. The cubic root of 2239381 is about 130.8305989755.

It can be divided in two parts, 223 and 9381, that added together give a square (9604 = 98²).

The spelling of 2239381 in words is "two million, two hundred thirty-nine thousand, three hundred eighty-one".