231169116528 has 360 divisors, whose sum is σ = 771119930880. Its totient is φ = 64438778880.

The previous prime is 231169116481. The next prime is 231169116539. The reversal of 231169116528 is 825611961132.

It is a happy number.

231169116528 is a `hidden beast` number, since 2 + 3 + 1 + 1 + 6 + 9 + 116 + 528 = 666.

It is a congruent number.

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 71 ways as a sum of consecutive naturals, for example, 54660718 + ... + 54664946.

It is an arithmetic number, because the mean of its divisors is an integer number (2141999808).

Almost surely, 2^231169116528 is an apocalyptic number.

231169116528 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231169116528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (385559965440).

231169116528 is an abundant number, since it is smaller than the sum of its proper divisors (539950814352).

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

231169116528 is a wasteful number, since it uses less digits than its factorization.

231169116528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4445 (or 4429 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The spelling of 231169116528 in words is "two hundred thirty-one billion, one hundred sixty-nine million, one hundred sixteen thousand, five hundred twenty-eight".