2231331 has 4 divisors (see below), whose sum is σ = 2975112. Its totient is φ = 1487552.

The previous prime is 2231329. The next prime is 2231351. The reversal of 2231331 is 1331322.

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

It is a cyclic number.

It is not a de Polignac number, because 2231331 - 2¹ = 2231329 is a prime.

It is a super-3 number, since 3×2231331³ = 33328306931403113073, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 2231331.

It is not an unprimeable number, because it can be changed into a prime (2231311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 371886 + ... + 371891.

It is an arithmetic number, because the mean of its divisors is an integer number (743778).

2^2231331 is an apocalyptic number.

2231331 is a deficient number, since it is larger than the sum of its proper divisors (743781).

2231331 is an equidigital number, since it uses as much as digits as its factorization.

2231331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743780.

The product of its digits is 108, while the sum is 15.

The square root of 2231331 is about 1493.7640375909. The cubic root of 2231331 is about 130.6736432771.

Adding to 2231331 its reverse (1331322), we get a palindrome (3562653).

Subtracting from 2231331 its reverse (1331322), we obtain a palindrome (900009).

The spelling of 2231331 in words is "two million, two hundred thirty-one thousand, three hundred thirty-one".