231323031097 has 2 divisors, whose sum is σ = 231323031098. Its totient is φ = 231323031096.

The previous prime is 231323031089. The next prime is 231323031103. The reversal of 231323031097 is 790130323132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204535489536 + 26787541561 = 452256^2 + 163669^2 .

It is a cyclic number.

It is not a de Polignac number, because 231323031097 - 2³ = 231323031089 is a prime.

It is not a weakly prime, because it can be changed into another prime (231323031697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115661515548 + 115661515549.

It is an arithmetic number, because the mean of its divisors is an integer number (115661515549).

Almost surely, 2^231323031097 is an apocalyptic number.

It is an amenable number.

231323031097 is a deficient number, since it is larger than the sum of its proper divisors (1).

231323031097 is an equidigital number, since it uses as much as digits as its factorization.

231323031097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 34.

The spelling of 231323031097 in words is "two hundred thirty-one billion, three hundred twenty-three million, thirty-one thousand, ninety-seven".