203312320331 has 2 divisors, whose sum is σ = 203312320332. Its totient is φ = 203312320330.

The previous prime is 203312320313. The next prime is 203312320361. The reversal of 203312320331 is 133023213302.

Together with previous prime (203312320313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203312320331 is a prime.

It is a super-2 number, since 2×203312320331² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 203312320297 and 203312320306.

It is not a weakly prime, because it can be changed into another prime (203312320361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101656160165 + 101656160166.

It is an arithmetic number, because the mean of its divisors is an integer number (101656160166).

Almost surely, 2^203312320331 is an apocalyptic number.

203312320331 is a deficient number, since it is larger than the sum of its proper divisors (1).

203312320331 is an equidigital number, since it uses as much as digits as its factorization.

203312320331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 203312320331 its reverse (133023213302), we get a palindrome (336335533633).

The spelling of 203312320331 in words is "two hundred three billion, three hundred twelve million, three hundred twenty thousand, three hundred thirty-one".