231332220337 has 2 divisors, whose sum is σ = 231332220338. Its totient is φ = 231332220336.

The previous prime is 231332220307. The next prime is 231332220349. The reversal of 231332220337 is 733022233132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217264125456 + 14068094881 = 466116^2 + 118609^2 .

It is a cyclic number.

It is not a de Polignac number, because 231332220337 - 2¹¹ = 231332218289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231332220299 and 231332220308.

It is not a weakly prime, because it can be changed into another prime (231332220307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115666110168 + 115666110169.

It is an arithmetic number, because the mean of its divisors is an integer number (115666110169).

Almost surely, 2^231332220337 is an apocalyptic number.

It is an amenable number.

231332220337 is a deficient number, since it is larger than the sum of its proper divisors (1).

231332220337 is an equidigital number, since it uses as much as digits as its factorization.

231332220337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 31.

Adding to 231332220337 its reverse (733022233132), we get a palindrome (964354453469).

The spelling of 231332220337 in words is "two hundred thirty-one billion, three hundred thirty-two million, two hundred twenty thousand, three hundred thirty-seven".