231131104 has 48 divisors (see below), whose sum is σ = 470564640. Its totient is φ = 111677440.

The previous prime is 231131059. The next prime is 231131111. The reversal of 231131104 is 401131132.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147477 + ... + 149035.

It is an arithmetic number, because the mean of its divisors is an integer number (9803430).

Almost surely, 2^231131104 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 231131104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235282320).

231131104 is an abundant number, since it is smaller than the sum of its proper divisors (239433536).

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

231131104 is a wasteful number, since it uses less digits than its factorization.

231131104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723 (or 1715 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 231131104 is about 15202.9965467338. The cubic root of 231131104 is about 613.6953009353.

Adding to 231131104 its reverse (401131132), we get a palindrome (632262236).

The spelling of 231131104 in words is "two hundred thirty-one million, one hundred thirty-one thousand, one hundred four".