1231434231 has 8 divisors (see below), whose sum is σ = 1661694720.
Its totient is φ = 811064952.
The previous prime is 1231434187. The next prime is 1231434257. The reversal of 1231434231 is 1324341321.
Adding to 1231434231 its reverse (1324341321), we get a palindrome (2555775552).
It can be divided in two parts, 1231434 and 231, that added together give a triangular number (1231665 = T1569).
It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 1231434231 - 26 = 1231434167 is a prime.
It is a super-2 number, since 2×12314342312 = 3032860530557122722, which contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1231434271) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2472511 + ... + 2473008.
It is an arithmetic number, because the mean of its divisors is an integer number (207711840).
Almost surely, 21231434231 is an apocalyptic number.
1231434231 is a deficient number, since it is larger than the sum of its proper divisors (430260489).
1231434231 is an equidigital number, since it uses as much as digits as its factorization.
1231434231 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4945605.
The product of its digits is 1728, while the sum is 24.
The square root of 1231434231 is about 35091.7972039051.
The cubic root of 1231434231 is about 1071.8575562456.
The spelling of 1231434231 in words is "one billion, two hundred thirty-one million, four hundred thirty-four thousand, two hundred thirty-one".