231431234 has 8 divisors (see below), whose sum is σ = 367567308. Its totient is φ = 108908800.

The previous prime is 231431219. The next prime is 231431237. The reversal of 231431234 is 432134132.

231431234 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 228100609 + 3330625 = 15103^2 + 1825^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231431237) 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, 3403367 + ... + 3403434.

Almost surely, 2^231431234 is an apocalyptic number.

231431234 is a deficient number, since it is larger than the sum of its proper divisors (136136074).

231431234 is a wasteful number, since it uses less digits than its factorization.

231431234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6806820.

The product of its digits is 1728, while the sum is 23.

The square root of 231431234 is about 15212.8640958894. The cubic root of 231431234 is about 613.9608193653.

Adding to 231431234 its reverse (432134132), we get a palindrome (663565366).

The spelling of 231431234 in words is "two hundred thirty-one million, four hundred thirty-one thousand, two hundred thirty-four".