231326436 has 48 divisors (see below), whose sum is σ = 593510400. Its totient is φ = 69541920.

The previous prime is 231326423. The next prime is 231326483. The reversal of 231326436 is 634623132.

231326436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9865 + ... + 23663.

It is an arithmetic number, because the mean of its divisors is an integer number (12364800).

Almost surely, 2^231326436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231326436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296755200).

231326436 is an abundant number, since it is smaller than the sum of its proper divisors (362183964).

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

231326436 is a wasteful number, since it uses less digits than its factorization.

231326436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13944 (or 13942 counting only the distinct ones).

The product of its digits is 15552, while the sum is 30.

The square root of 231326436 is about 15209.4193183040. The cubic root of 231326436 is about 613.8681329704.

Adding to 231326436 its reverse (634623132), we get a palindrome (865949568).

The spelling of 231326436 in words is "two hundred thirty-one million, three hundred twenty-six thousand, four hundred thirty-six".