231404131 has 8 divisors (see below), whose sum is σ = 268409600. Its totient is φ = 195385608.

The previous prime is 231404099. The next prime is 231404141. The reversal of 231404131 is 131404132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231404131 - 2⁵ = 231404099 is a prime.

It is a super-2 number, since 2×231404131² = 107095743687730322, 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 = 231404099 and 231404108.

It is not an unprimeable number, because it can be changed into a prime (231404141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246231 + ... + 247168.

It is an arithmetic number, because the mean of its divisors is an integer number (33551200).

Almost surely, 2^231404131 is an apocalyptic number.

231404131 is a deficient number, since it is larger than the sum of its proper divisors (37005469).

231404131 is an equidigital number, since it uses as much as digits as its factorization.

231404131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493473.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 231404131 is about 15211.9732776520. The cubic root of 231404131 is about 613.9368513678.

Adding to 231404131 its reverse (131404132), we get a palindrome (362808263).

Subtracting from 231404131 its reverse (131404132), we obtain a palindrome (99999999).

The spelling of 231404131 in words is "two hundred thirty-one million, four hundred four thousand, one hundred thirty-one".