231411133 has 2 divisors, whose sum is σ = 231411134. Its totient is φ = 231411132.

The previous prime is 231411121. The next prime is 231411143. The reversal of 231411133 is 331114132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210453049 + 20958084 = 14507^2 + 4578^2 .

It is a cyclic number.

It is not a de Polignac number, because 231411133 - 2⁵ = 231411101 is a prime.

It is a super-2 number, since 2×231411133² = 107102224952687378, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231411133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231411143) 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, 115705566 + 115705567.

It is an arithmetic number, because the mean of its divisors is an integer number (115705567).

Almost surely, 2^231411133 is an apocalyptic number.

It is an amenable number.

231411133 is a deficient number, since it is larger than the sum of its proper divisors (1).

231411133 is an equidigital number, since it uses as much as digits as its factorization.

231411133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 19.

The square root of 231411133 is about 15212.2034235675. The cubic root of 231411133 is about 613.9430436262.

Adding to 231411133 its reverse (331114132), we get a palindrome (562525265).

The spelling of 231411133 in words is "two hundred thirty-one million, four hundred eleven thousand, one hundred thirty-three".