231032031233 has 4 divisors (see below), whose sum is σ = 231302878548. Its totient is φ = 230761183920.

The previous prime is 231032031221. The next prime is 231032031247. The reversal of 231032031233 is 332130230132.

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 7598085889 + 223433945344 = 87167^2 + 472688^2 .

It is a cyclic number.

It is not a de Polignac number, because 231032031233 - 2⁶ = 231032031169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231032031199 and 231032031208.

It is not an unprimeable number, because it can be changed into a prime (231032031253) 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, 135422378 + ... + 135424083.

It is an arithmetic number, because the mean of its divisors is an integer number (57825719637).

Almost surely, 2^231032031233 is an apocalyptic number.

It is an amenable number.

231032031233 is a deficient number, since it is larger than the sum of its proper divisors (270847315).

231032031233 is an equidigital number, since it uses as much as digits as its factorization.

231032031233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270847314.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 231032031233 its reverse (332130230132), we get a palindrome (563162261365).

The spelling of 231032031233 in words is "two hundred thirty-one billion, thirty-two million, thirty-one thousand, two hundred thirty-three".