231107131 has 4 divisors (see below), whose sum is σ = 236024352. Its totient is φ = 226189912.

The previous prime is 231107117. The next prime is 231107147. The reversal of 231107131 is 131701132.

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 231107131 - 2²³ = 222718523 is a prime.

It is a super-2 number, since 2×231107131² = 106821011998102322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231107099 and 231107108.

It is not an unprimeable number, because it can be changed into a prime (231107171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2458540 + ... + 2458633.

It is an arithmetic number, because the mean of its divisors is an integer number (59006088).

Almost surely, 2^231107131 is an apocalyptic number.

231107131 is a deficient number, since it is larger than the sum of its proper divisors (4917221).

231107131 is an equidigital number, since it uses as much as digits as its factorization.

231107131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4917220.

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 231107131 is about 15202.2080961944. The cubic root of 231107131 is about 613.6740826370.

Adding to 231107131 its reverse (131701132), we get a palindrome (362808263).

The spelling of 231107131 in words is "two hundred thirty-one million, one hundred seven thousand, one hundred thirty-one".