231909119 has 4 divisors (see below), whose sum is σ = 249748296. Its totient is φ = 214069944.

The previous prime is 231909071. The next prime is 231909133. The reversal of 231909119 is 911909132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231909119 - 2⁸ = 231908863 is a prime.

It is a super-2 number, since 2×231909119² = 107563678950712322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231909149) 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 3 ways as a sum of consecutive naturals, for example, 8919569 + ... + 8919594.

It is an arithmetic number, because the mean of its divisors is an integer number (62437074).

Almost surely, 2^231909119 is an apocalyptic number.

231909119 is a deficient number, since it is larger than the sum of its proper divisors (17839177).

231909119 is a wasteful number, since it uses less digits than its factorization.

231909119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17839176.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 231909119 is about 15228.5626045271. The cubic root of 231909119 is about 614.3831203980.

The spelling of 231909119 in words is "two hundred thirty-one million, nine hundred nine thousand, one hundred nineteen".