231132191161 has 2 divisors, whose sum is σ = 231132191162. Its totient is φ = 231132191160.

The previous prime is 231132191137. The next prime is 231132191179. The reversal of 231132191161 is 161191231132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231130177600 + 2013561 = 480760^2 + 1419^2 .

It is a cyclic number.

It is not a de Polignac number, because 231132191161 - 2¹⁹ = 231131666873 is a prime.

It is not a weakly prime, because it can be changed into another prime (231132191561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115566095580 + 115566095581.

It is an arithmetic number, because the mean of its divisors is an integer number (115566095581).

Almost surely, 2^231132191161 is an apocalyptic number.

It is an amenable number.

231132191161 is a deficient number, since it is larger than the sum of its proper divisors (1).

231132191161 is an equidigital number, since it uses as much as digits as its factorization.

231132191161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 31.

The spelling of 231132191161 in words is "two hundred thirty-one billion, one hundred thirty-two million, one hundred ninety-one thousand, one hundred sixty-one".