331312231193 has 2 divisors, whose sum is σ = 331312231194. Its totient is φ = 331312231192.

The previous prime is 331312231139. The next prime is 331312231231. The reversal of 331312231193 is 391132213133.

Together with previous prime (331312231139) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 282202125529 + 49110105664 = 531227^2 + 221608^2 .

It is a cyclic number.

It is not a de Polignac number, because 331312231193 - 2²² = 331308036889 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (331312231123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165656115596 + 165656115597.

It is an arithmetic number, because the mean of its divisors is an integer number (165656115597).

Almost surely, 2^331312231193 is an apocalyptic number.

It is an amenable number.

331312231193 is a deficient number, since it is larger than the sum of its proper divisors (1).

331312231193 is an equidigital number, since it uses as much as digits as its factorization.

331312231193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 32.

The spelling of 331312231193 in words is "three hundred thirty-one billion, three hundred twelve million, two hundred thirty-one thousand, one hundred ninety-three".