231215600 has 120 divisors (see below), whose sum is σ = 692658048. Its totient is φ = 72057600.

The previous prime is 231215599. The next prime is 231215609. The reversal of 231215600 is 6512132.

231215600 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231215609) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27047 + ... + 34553.

Almost surely, 2^231215600 is an apocalyptic number.

231215600 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 231215600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346329024).

231215600 is an abundant number, since it is smaller than the sum of its proper divisors (461442448).

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

231215600 is a wasteful number, since it uses less digits than its factorization.

231215600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7543 (or 7532 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 231215600 is about 15205.7752186464. The cubic root of 231215600 is about 613.7700759289.

Adding to 231215600 its reverse (6512132), we get a palindrome (237727732).

The spelling of 231215600 in words is "two hundred thirty-one million, two hundred fifteen thousand, six hundred".