231220320223 has 8 divisors (see below), whose sum is σ = 241291785600. Its totient is φ = 221150388888.

The previous prime is 231220320211. The next prime is 231220320251. The reversal of 231220320223 is 322023022132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231220320223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231220320194 and 231220320203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231220320283) 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, 70033 + ... + 683626.

It is an arithmetic number, because the mean of its divisors is an integer number (30161473200).

Almost surely, 2^231220320223 is an apocalyptic number.

231220320223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

231220320223 is a deficient number, since it is larger than the sum of its proper divisors (10071465377).

231220320223 is a wasteful number, since it uses less digits than its factorization.

231220320223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767021.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 231220320223 its reverse (322023022132), we get a palindrome (553243342355).

The spelling of 231220320223 in words is "two hundred thirty-one billion, two hundred twenty million, three hundred twenty thousand, two hundred twenty-three".