231343220333 has 4 divisors (see below), whose sum is σ = 231379527228. Its totient is φ = 231306913440.

The previous prime is 231343220261. The next prime is 231343220369. The reversal of 231343220333 is 333022343132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 189693349444 + 41649870889 = 435538^2 + 204083^2 .

It is a cyclic number.

It is not a de Polignac number, because 231343220333 - 2⁸ = 231343220077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231343220296 and 231343220305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231343420333) 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, 18143888 + ... + 18156633.

It is an arithmetic number, because the mean of its divisors is an integer number (57844881807).

Almost surely, 2^231343220333 is an apocalyptic number.

It is an amenable number.

231343220333 is a deficient number, since it is larger than the sum of its proper divisors (36306895).

231343220333 is an equidigital number, since it uses as much as digits as its factorization.

231343220333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36306894.

The product of its (nonzero) digits is 23328, while the sum is 29.

Adding to 231343220333 its reverse (333022343132), we get a palindrome (564365563465).

The spelling of 231343220333 in words is "two hundred thirty-one billion, three hundred forty-three million, two hundred twenty thousand, three hundred thirty-three".