231043221036 has 72 divisors (see below), whose sum is σ = 619294908960. Its totient is φ = 72376951296.

The previous prime is 231043221029. The next prime is 231043221077. The reversal of 231043221036 is 630122340132.

231043221036 is a `hidden beast` number, since 2 + 3 + 10 + 432 + 210 + 3 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135505 + ... + 693143.

It is an arithmetic number, because the mean of its divisors is an integer number (8601318180).

Almost surely, 2^231043221036 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 231043221036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309647454480).

231043221036 is an abundant number, since it is smaller than the sum of its proper divisors (388251687924).

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

231043221036 is a wasteful number, since it uses less digits than its factorization.

231043221036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558343 (or 558338 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 231043221036 its reverse (630122340132), we get a palindrome (861165561168).

The spelling of 231043221036 in words is "two hundred thirty-one billion, forty-three million, two hundred twenty-one thousand, thirty-six".