231161611 has 2 divisors, whose sum is σ = 231161612. Its totient is φ = 231161610.

The previous prime is 231161603. The next prime is 231161617. The reversal of 231161611 is 116161132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231161611 - 2³ = 231161603 is a prime.

It is a super-3 number, since 3×231161611³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231161617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115580805 + 115580806.

It is an arithmetic number, because the mean of its divisors is an integer number (115580806).

Almost surely, 2^231161611 is an apocalyptic number.

231161611 is a deficient number, since it is larger than the sum of its proper divisors (1).

231161611 is an equidigital number, since it uses as much as digits as its factorization.

231161611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 22.

The square root of 231161611 is about 15203.9998355696. Note that the first 3 decimals coincide. The cubic root of 231161611 is about 613.7223003000.

The spelling of 231161611 in words is "two hundred thirty-one million, one hundred sixty-one thousand, six hundred eleven".