231326216 has 64 divisors (see below), whose sum is σ = 514252800. Its totient is φ = 96379200.

The previous prime is 231326209. The next prime is 231326237. The reversal of 231326216 is 612623132.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49601 + ... + 54063.

It is an arithmetic number, because the mean of its divisors is an integer number (8035200).

Almost surely, 2^231326216 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 231326216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257126400).

231326216 is an abundant number, since it is smaller than the sum of its proper divisors (282926584).

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

231326216 is a wasteful number, since it uses less digits than its factorization.

231326216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4530 (or 4526 counting only the distinct ones).

The product of its digits is 2592, while the sum is 26.

The square root of 231326216 is about 15209.4120859420. The cubic root of 231326216 is about 613.8679383666.

Adding to 231326216 its reverse (612623132), we get a palindrome (843949348).

The spelling of 231326216 in words is "two hundred thirty-one million, three hundred twenty-six thousand, two hundred sixteen".