231981871104 has 208 divisors, whose sum is σ = 689302137600. Its totient is φ = 77098696704.

The previous prime is 231981871067. The next prime is 231981871117. The reversal of 231981871104 is 401178189132.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 231981871104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39699607 + ... + 39705449.

Almost surely, 2^231981871104 is an apocalyptic number.

231981871104 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 231981871104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344651068800).

231981871104 is an abundant number, since it is smaller than the sum of its proper divisors (457320266496).

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

231981871104 is an equidigital number, since it uses as much as digits as its factorization.

231981871104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6235 (or 6207 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The spelling of 231981871104 in words is "two hundred thirty-one billion, nine hundred eighty-one million, eight hundred seventy-one thousand, one hundred four".