2281138 has 4 divisors (see below), whose sum is σ = 3421710. Its totient is φ = 1140568.

The previous prime is 2281127. The next prime is 2281151. The reversal of 2281138 is 8311822.

2281138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8311822 = 2 ⋅4155911.

It can be written as a sum of positive squares in only one way, i.e., 1912689 + 368449 = 1383^2 + 607^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 570283 + ... + 570286.

2^2281138 is an apocalyptic number.

2281138 is a deficient number, since it is larger than the sum of its proper divisors (1140572).

2281138 is a wasteful number, since it uses less digits than its factorization.

2281138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140571.

The product of its digits is 768, while the sum is 25.

The square root of 2281138 is about 1510.3436695004. The cubic root of 2281138 is about 131.6387813260.

The spelling of 2281138 in words is "two million, two hundred eighty-one thousand, one hundred thirty-eight".