231240443233 has 16 divisors (see below), whose sum is σ = 241096440384. Its totient is φ = 221575970880.

The previous prime is 231240443219. The next prime is 231240443267. The reversal of 231240443233 is 332344042132.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 231240443233 - 2²¹ = 231238346081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231240443195 and 231240443204.

It is not an unprimeable number, because it can be changed into a prime (231241443233) 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 15 ways as a sum of consecutive naturals, for example, 12214491 + ... + 12233407.

It is an arithmetic number, because the mean of its divisors is an integer number (15068527524).

Almost surely, 2^231240443233 is an apocalyptic number.

It is an amenable number.

231240443233 is a deficient number, since it is larger than the sum of its proper divisors (9855997151).

231240443233 is a wasteful number, since it uses less digits than its factorization.

231240443233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23952.

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 231240443233 its reverse (332344042132), we get a palindrome (563584485365).

The spelling of 231240443233 in words is "two hundred thirty-one billion, two hundred forty million, four hundred forty-three thousand, two hundred thirty-three".