231109131 has 16 divisors (see below), whose sum is σ = 337000320. Its totient is φ = 139715520.

The previous prime is 231109127. The next prime is 231109147. The reversal of 231109131 is 131901132.

231109131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231109131 - 2² = 231109127 is a prime.

It is a super-2 number, since 2×231109131² = 106822860863150322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231109098 and 231109107.

It is not an unprimeable number, because it can be changed into a prime (231109111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4936 + ... + 22058.

It is an arithmetic number, because the mean of its divisors is an integer number (21062520).

Almost surely, 2^231109131 is an apocalyptic number.

231109131 is a deficient number, since it is larger than the sum of its proper divisors (105891189).

231109131 is a wasteful number, since it uses less digits than its factorization.

231109131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17546.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 231109131 is about 15202.2738759700. The cubic root of 231109131 is about 613.6758528761.

The spelling of 231109131 in words is "two hundred thirty-one million, one hundred nine thousand, one hundred thirty-one".