231116730 has 64 divisors (see below), whose sum is σ = 599840640. Its totient is φ = 56653056.

The previous prime is 231116723. The next prime is 231116797. The reversal of 231116730 is 37611132.

It is a self number, because there is not a number n which added to its sum of digits gives 231116730.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 103809 + ... + 106011.

It is an arithmetic number, because the mean of its divisors is an integer number (9372510).

Almost surely, 2^231116730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231116730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299920320).

231116730 is an abundant number, since it is smaller than the sum of its proper divisors (368723910).

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

231116730 is a wasteful number, since it uses less digits than its factorization.

231116730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 231116730 is about 15202.5238036321. The cubic root of 231116730 is about 613.6825788063.

Adding to 231116730 its reverse (37611132), we get a palindrome (268727862).

The spelling of 231116730 in words is "two hundred thirty-one million, one hundred sixteen thousand, seven hundred thirty".