231331212337 has 2 divisors, whose sum is σ = 231331212338. Its totient is φ = 231331212336.

The previous prime is 231331212263. The next prime is 231331212349. The reversal of 231331212337 is 733212133132.

It is a happy number.

231331212337 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230437441521 + 893770816 = 480039^2 + 29896^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231331212337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231331212299 and 231331212308.

It is not a weakly prime, because it can be changed into another prime (231331212367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115665606168 + 115665606169.

It is an arithmetic number, because the mean of its divisors is an integer number (115665606169).

Almost surely, 2^231331212337 is an apocalyptic number.

It is an amenable number.

231331212337 is a deficient number, since it is larger than the sum of its proper divisors (1).

231331212337 is an equidigital number, since it uses as much as digits as its factorization.

231331212337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 31.

Adding to 231331212337 its reverse (733212133132), we get a palindrome (964543345469).

The spelling of 231331212337 in words is "two hundred thirty-one billion, three hundred thirty-one million, two hundred twelve thousand, three hundred thirty-seven".