231344210161 has 2 divisors, whose sum is σ = 231344210162. Its totient is φ = 231344210160.

The previous prime is 231344210143. The next prime is 231344210243. The reversal of 231344210161 is 161012443132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155961016561 + 75383193600 = 394919^2 + 274560^2 .

It is a cyclic number.

It is not a de Polignac number, because 231344210161 - 2²⁹ = 230807339249 is a prime.

It is not a weakly prime, because it can be changed into another prime (231344210131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115672105080 + 115672105081.

It is an arithmetic number, because the mean of its divisors is an integer number (115672105081).

Almost surely, 2^231344210161 is an apocalyptic number.

It is an amenable number.

231344210161 is a deficient number, since it is larger than the sum of its proper divisors (1).

231344210161 is an equidigital number, since it uses as much as digits as its factorization.

231344210161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 231344210161 its reverse (161012443132), we get a palindrome (392356653293).

The spelling of 231344210161 in words is "two hundred thirty-one billion, three hundred forty-four million, two hundred ten thousand, one hundred sixty-one".