231528700 has 72 divisors (see below), whose sum is σ = 544045040. Its totient is φ = 85017600.

The previous prime is 231528667. The next prime is 231528707. The reversal of 231528700 is 7825132.

231528700 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 (231528707) 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 23 ways as a sum of consecutive naturals, for example, 312931 + ... + 313669.

Almost surely, 2^231528700 is an apocalyptic number.

231528700 is a gapful number since it is divisible by the number (20) 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 231528700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272022520).

231528700 is an abundant number, since it is smaller than the sum of its proper divisors (312516340).

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

231528700 is a wasteful number, since it uses less digits than its factorization.

231528700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007 (or 1000 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 231528700 is about 15216.0671659927. The cubic root of 231528700 is about 614.0469960173.

The spelling of 231528700 in words is "two hundred thirty-one million, five hundred twenty-eight thousand, seven hundred".