223031231 has 4 divisors (see below), whose sum is σ = 223109712. Its totient is φ = 222952752.

The previous prime is 223031203. The next prime is 223031233. The reversal of 223031231 is 132130322.

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 223031231 - 2⁶ = 223031167 is a prime.

It is a super-2 number, since 2×223031231² = 99485860002750722, 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 (223031233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34811 + ... + 40716.

It is an arithmetic number, because the mean of its divisors is an integer number (55777428).

Almost surely, 2^223031231 is an apocalyptic number.

223031231 is a deficient number, since it is larger than the sum of its proper divisors (78481).

223031231 is an equidigital number, since it uses as much as digits as its factorization.

223031231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78480.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 223031231 is about 14934.2301776824. The cubic root of 223031231 is about 606.4410073595.

Adding to 223031231 its reverse (132130322), we get a palindrome (355161553).

Subtracting from 223031231 its reverse (132130322), we obtain a palindrome (90900909).

The spelling of 223031231 in words is "two hundred twenty-three million, thirty-one thousand, two hundred thirty-one".