231331203331 has 4 divisors (see below), whose sum is σ = 244938921192. Its totient is φ = 217723485472.

The previous prime is 231331203317. The next prime is 231331203371. The reversal of 231331203331 is 133302133132.

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

It is a cyclic number.

It is not a de Polignac number, because 231331203331 - 2⁷ = 231331203203 is a prime.

It is a super-2 number, since 2×231331203331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231331203296 and 231331203305.

It is not an unprimeable number, because it can be changed into a prime (231331203371) 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 3 ways as a sum of consecutive naturals, for example, 6803858905 + ... + 6803858938.

It is an arithmetic number, because the mean of its divisors is an integer number (61234730298).

Almost surely, 2^231331203331 is an apocalyptic number.

231331203331 is a deficient number, since it is larger than the sum of its proper divisors (13607717861).

231331203331 is a wasteful number, since it uses less digits than its factorization.

231331203331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13607717860.

The product of its (nonzero) digits is 2916, while the sum is 25.

Adding to 231331203331 its reverse (133302133132), we get a palindrome (364633336463).

The spelling of 231331203331 in words is "two hundred thirty-one billion, three hundred thirty-one million, two hundred three thousand, three hundred thirty-one".