231313220223 has 4 divisors (see below), whose sum is σ = 308417626968. Its totient is φ = 154208813480.

The previous prime is 231313220189. The next prime is 231313220227. The reversal of 231313220223 is 322022313132.

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 231313220223 - 2¹⁶ = 231313154687 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231313220193 and 231313220202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231313220227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38552203368 + ... + 38552203373.

It is an arithmetic number, because the mean of its divisors is an integer number (77104406742).

Almost surely, 2^231313220223 is an apocalyptic number.

231313220223 is a deficient number, since it is larger than the sum of its proper divisors (77104406745).

231313220223 is an equidigital number, since it uses as much as digits as its factorization.

231313220223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77104406744.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 231313220223 its reverse (322022313132), we get a palindrome (553335533355).

The spelling of 231313220223 in words is "two hundred thirty-one billion, three hundred thirteen million, two hundred twenty thousand, two hundred twenty-three".