231311104 has 36 divisors (see below), whose sum is σ = 472478776. Its totient is φ = 112960512.

The previous prime is 231311081. The next prime is 231311107. The reversal of 231311104 is 401113132.

It is a hoax number, since the sum of its digits (16) coincides with the sum of the digits of its distinct prime factors.

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

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231311107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502 + ... + 21514.

Almost surely, 2^231311104 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 231311104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236239388).

231311104 is an abundant number, since it is smaller than the sum of its proper divisors (241167672).

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

231311104 is an equidigital number, since it uses as much as digits as its factorization.

231311104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21072 (or 21058 counting only the distinct ones).

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

The square root of 231311104 is about 15208.9152801901. The cubic root of 231311104 is about 613.8545705571.

Adding to 231311104 its reverse (401113132), we get a palindrome (632424236).

The spelling of 231311104 in words is "two hundred thirty-one million, three hundred eleven thousand, one hundred four".