231320143104 has 72 divisors (see below), whose sum is σ = 616305097632. Its totient is φ = 77024532480.

The previous prime is 231320143091. The next prime is 231320143141. The reversal of 231320143104 is 401341023132.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 562647 + ... + 882729.

Almost surely, 2^231320143104 is an apocalyptic number.

231320143104 is a gapful number since it is divisible by the number (24) 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 231320143104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308152548816).

231320143104 is an abundant number, since it is smaller than the sum of its proper divisors (384984954528).

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

231320143104 is an equidigital number, since it uses as much as digits as its factorization.

231320143104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321043 (or 321029 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 231320143104 its reverse (401341023132), we get a palindrome (632661166236).

The spelling of 231320143104 in words is "two hundred thirty-one billion, three hundred twenty million, one hundred forty-three thousand, one hundred four".