231020223 has 32 divisors (see below), whose sum is σ = 360875520. Its totient is φ = 128732160.

The previous prime is 231020197. The next prime is 231020233. The reversal of 231020223 is 322020132.

It is not a de Polignac number, because 231020223 - 2¹² = 231016127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231020233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169063 + ... + 170423.

It is an arithmetic number, because the mean of its divisors is an integer number (11277360).

Almost surely, 2^231020223 is an apocalyptic number.

231020223 is a deficient number, since it is larger than the sum of its proper divisors (129855297).

231020223 is a wasteful number, since it uses less digits than its factorization.

231020223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 231020223 is about 15199.3494268669. The cubic root of 231020223 is about 613.5971488016.

Adding to 231020223 its reverse (322020132), we get a palindrome (553040355).

Subtracting 231020223 from its reverse (322020132), we obtain a palindrome (90999909).

The spelling of 231020223 in words is "two hundred thirty-one million, twenty thousand, two hundred twenty-three".