231215104 has 52 divisors (see below), whose sum is σ = 486873040. Its totient is φ = 109486080.

The previous prime is 231215099. The next prime is 231215107. The reversal of 231215104 is 401512132.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (231215107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76339 + ... + 79309.

Almost surely, 2^231215104 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 231215104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243436520).

231215104 is an abundant number, since it is smaller than the sum of its proper divisors (255657936).

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

231215104 is an equidigital number, since it uses as much as digits as its factorization.

231215104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3014 (or 2992 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 231215104 is about 15205.7589090450. The cubic root of 231215104 is about 613.7696370453.

Adding to 231215104 its reverse (401512132), we get a palindrome (632727236).

The spelling of 231215104 in words is "two hundred thirty-one million, two hundred fifteen thousand, one hundred four".