231135234 has 64 divisors (see below), whose sum is σ = 538610688. Its totient is φ = 65419200.

The previous prime is 231135199. The next prime is 231135239. The reversal of 231135234 is 432531132.

It is not an unprimeable number, because it can be changed into a prime (231135239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63504 + ... + 67044.

It is an arithmetic number, because the mean of its divisors is an integer number (8415792).

Almost surely, 2^231135234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231135234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269305344).

231135234 is an abundant number, since it is smaller than the sum of its proper divisors (307475454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231135234 is a wasteful number, since it uses less digits than its factorization.

231135234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3623.

The product of its digits is 2160, while the sum is 24.

The square root of 231135234 is about 15203.1323746128. The cubic root of 231135234 is about 613.6989562150.

Adding to 231135234 its reverse (432531132), we get a palindrome (663666366).

The spelling of 231135234 in words is "two hundred thirty-one million, one hundred thirty-five thousand, two hundred thirty-four".