2231663 has 4 divisors (see below), whose sum is σ = 2550480. Its totient is φ = 1912848.

The previous prime is 2231653. The next prime is 2231681. The reversal of 2231663 is 3661322.

2231663 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.

It is not a de Polignac number, because 2231663 - 2⁶ = 2231599 is a prime.

It is a super-3 number, since 3×2231663³ = 33343185913067253741, which contains 333 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 (2231623) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 159398 + ... + 159411.

It is an arithmetic number, because the mean of its divisors is an integer number (637620).

2^2231663 is an apocalyptic number.

2231663 is a deficient number, since it is larger than the sum of its proper divisors (318817).

2231663 is an equidigital number, since it uses as much as digits as its factorization.

2231663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318816.

The product of its digits is 1296, while the sum is 23.

The square root of 2231663 is about 1493.8751621203. The cubic root of 2231663 is about 130.6801239379.

Adding to 2231663 its reverse (3661322), we get a palindrome (5892985).

The spelling of 2231663 in words is "two million, two hundred thirty-one thousand, six hundred sixty-three".