231204012817 has 2 divisors, whose sum is σ = 231204012818. Its totient is φ = 231204012816.

The previous prime is 231204012797. The next prime is 231204012827. The reversal of 231204012817 is 718210402132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149775966081 + 81428046736 = 387009^2 + 285356^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231204012817 is a prime.

It is not a weakly prime, because it can be changed into another prime (231204012827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115602006408 + 115602006409.

It is an arithmetic number, because the mean of its divisors is an integer number (115602006409).

Almost surely, 2^231204012817 is an apocalyptic number.

It is an amenable number.

231204012817 is a deficient number, since it is larger than the sum of its proper divisors (1).

231204012817 is an equidigital number, since it uses as much as digits as its factorization.

231204012817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 31.

Adding to 231204012817 its reverse (718210402132), we get a palindrome (949414414949).

The spelling of 231204012817 in words is "two hundred thirty-one billion, two hundred four million, twelve thousand, eight hundred seventeen".