231301243997 has 2 divisors, whose sum is σ = 231301243998. Its totient is φ = 231301243996.

The previous prime is 231301243903. The next prime is 231301244003. The reversal of 231301243997 is 799342103132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230036303641 + 1264940356 = 479621^2 + 35566^2 .

It is a cyclic number.

It is not a de Polignac number, because 231301243997 - 2⁸ = 231301243741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231301243697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115650621998 + 115650621999.

It is an arithmetic number, because the mean of its divisors is an integer number (115650621999).

Almost surely, 2^231301243997 is an apocalyptic number.

It is an amenable number.

231301243997 is a deficient number, since it is larger than the sum of its proper divisors (1).

231301243997 is an equidigital number, since it uses as much as digits as its factorization.

231301243997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 44.

The spelling of 231301243997 in words is "two hundred thirty-one billion, three hundred one million, two hundred forty-three thousand, nine hundred ninety-seven".