231135219 has 24 divisors (see below), whose sum is σ = 382237440. Its totient is φ = 131841648.

The previous prime is 231135199. The next prime is 231135239. The reversal of 231135219 is 912531132.

231135219 is a `hidden beast` number, since 23 + 113 + 521 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (231135199) and next prime (231135239).

It is not a de Polignac number, because 231135219 - 2⁵ = 231135187 is a prime.

It is a super-2 number, since 2×231135219² = 106846978924355922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231135192 and 231135201.

It is not an unprimeable number, because it can be changed into a prime (231135239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36034 + ... + 41960.

It is an arithmetic number, because the mean of its divisors is an integer number (15926560).

Almost surely, 2^231135219 is an apocalyptic number.

231135219 is a deficient number, since it is larger than the sum of its proper divisors (151102221).

231135219 is a wasteful number, since it uses less digits than its factorization.

231135219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6559 (or 6556 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 231135219 is about 15203.1318812934. The cubic root of 231135219 is about 613.6989429392.

The spelling of 231135219 in words is "two hundred thirty-one million, one hundred thirty-five thousand, two hundred nineteen".