231504549197 has 2 divisors, whose sum is σ = 231504549198. Its totient is φ = 231504549196.

The previous prime is 231504549167. The next prime is 231504549247. The reversal of 231504549197 is 791945405132.

It is an a-pointer prime, because the next prime (231504549247) can be obtained adding 231504549197 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170379898441 + 61124650756 = 412771^2 + 247234^2 .

It is a cyclic number.

It is not a de Polignac number, because 231504549197 - 2¹⁰ = 231504548173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231504549167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115752274598 + 115752274599.

It is an arithmetic number, because the mean of its divisors is an integer number (115752274599).

Almost surely, 2^231504549197 is an apocalyptic number.

It is an amenable number.

231504549197 is a deficient number, since it is larger than the sum of its proper divisors (1).

231504549197 is an equidigital number, since it uses as much as digits as its factorization.

231504549197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The spelling of 231504549197 in words is "two hundred thirty-one billion, five hundred four million, five hundred forty-nine thousand, one hundred ninety-seven".