231231232331 has 16 divisors (see below), whose sum is σ = 252637056000. Its totient is φ = 209889794400.

The previous prime is 231231232307. The next prime is 231231232333. The reversal of 231231232331 is 133232132132.

It is not a de Polignac number, because 231231232331 - 2²² = 231227038027 is a prime.

It is a super-3 number, since 3×231231232331³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231231232331.

It is not an unprimeable number, because it can be changed into a prime (231231232333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24492710 + ... + 24502148.

It is an arithmetic number, because the mean of its divisors is an integer number (15789816000).

Almost surely, 2^231231232331 is an apocalyptic number.

231231232331 is a deficient number, since it is larger than the sum of its proper divisors (21405823669).

231231232331 is a wasteful number, since it uses less digits than its factorization.

231231232331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12610.

The product of its digits is 3888, while the sum is 26.

Adding to 231231232331 its reverse (133232132132), we get a palindrome (364463364463).

The spelling of 231231232331 in words is "two hundred thirty-one billion, two hundred thirty-one million, two hundred thirty-two thousand, three hundred thirty-one".