231085219 has 2 divisors, whose sum is σ = 231085220. Its totient is φ = 231085218.

The previous prime is 231085189. The next prime is 231085237. The reversal of 231085219 is 912580132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231085219 - 2²³ = 222696611 is a prime.

It is a super-2 number, since 2×231085219² = 106800756880555922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231085289) 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, 115542609 + 115542610.

It is an arithmetic number, because the mean of its divisors is an integer number (115542610).

Almost surely, 2^231085219 is an apocalyptic number.

231085219 is a deficient number, since it is larger than the sum of its proper divisors (1).

231085219 is an equidigital number, since it uses as much as digits as its factorization.

231085219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 231085219 is about 15201.4873943309. The cubic root of 231085219 is about 613.6546872287.

The spelling of 231085219 in words is "two hundred thirty-one million, eighty-five thousand, two hundred nineteen".