231505116 has 48 divisors (see below), whose sum is σ = 573640704. Its totient is φ = 72414976.

The previous prime is 231505111. The next prime is 231505123. The reversal of 231505116 is 611505132.

231505116 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231505111) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 76651 + ... + 79613.

It is an arithmetic number, because the mean of its divisors is an integer number (11950848).

Almost surely, 2^231505116 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 231505116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286820352).

231505116 is an abundant number, since it is smaller than the sum of its proper divisors (342135588).

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

231505116 is a wasteful number, since it uses less digits than its factorization.

231505116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3370 (or 3368 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 231505116 is about 15215.2921759656. The cubic root of 231505116 is about 614.0261459368.

The spelling of 231505116 in words is "two hundred thirty-one million, five hundred five thousand, one hundred sixteen".