231021223 has 8 divisors (see below), whose sum is σ = 245615328. Its totient is φ = 216806304.

The previous prime is 231021191. The next prime is 231021227. The reversal of 231021223 is 322120132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231021223 - 2⁵ = 231021191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231021197 and 231021206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231021227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93540 + ... + 95977.

It is an arithmetic number, because the mean of its divisors is an integer number (30701916).

Almost surely, 2^231021223 is an apocalyptic number.

231021223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

231021223 is a deficient number, since it is larger than the sum of its proper divisors (14594105).

231021223 is a wasteful number, since it uses less digits than its factorization.

231021223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189593.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 231021223 is about 15199.3823229762. The cubic root of 231021223 is about 613.5980341444.

Adding to 231021223 its reverse (322120132), we get a palindrome (553141355).

The spelling of 231021223 in words is "two hundred thirty-one million, twenty-one thousand, two hundred twenty-three".