231231000233 has 4 divisors (see below), whose sum is σ = 235593849348. Its totient is φ = 226868151120.

The previous prime is 231231000191. The next prime is 231231000239. The reversal of 231231000233 is 332000132132.

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 178550192704 + 52680807529 = 422552^2 + 229523^2 .

It is a cyclic number.

It is not a de Polignac number, because 231231000233 - 2¹² = 231230996137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231231000239) 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, 2181424478 + ... + 2181424583.

It is an arithmetic number, because the mean of its divisors is an integer number (58898462337).

Almost surely, 2^231231000233 is an apocalyptic number.

It is an amenable number.

231231000233 is a deficient number, since it is larger than the sum of its proper divisors (4362849115).

231231000233 is an equidigital number, since it uses as much as digits as its factorization.

231231000233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4362849114.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 231231000233 its reverse (332000132132), we get a palindrome (563231132365).

The spelling of 231231000233 in words is "two hundred thirty-one billion, two hundred thirty-one million, two hundred thirty-three", and thus it is an aban number.