231348517 has 2 divisors, whose sum is σ = 231348518. Its totient is φ = 231348516.

The previous prime is 231348511. The next prime is 231348569. The reversal of 231348517 is 715843132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216648961 + 14699556 = 14719^2 + 3834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231348517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231348511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115674258 + 115674259.

It is an arithmetic number, because the mean of its divisors is an integer number (115674259).

Almost surely, 2^231348517 is an apocalyptic number.

It is an amenable number.

231348517 is a deficient number, since it is larger than the sum of its proper divisors (1).

231348517 is an equidigital number, since it uses as much as digits as its factorization.

231348517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 231348517 is about 15210.1451998329. The cubic root of 231348517 is about 613.8876643755.

The spelling of 231348517 in words is "two hundred thirty-one million, three hundred forty-eight thousand, five hundred seventeen".