231305203140 has 192 divisors, whose sum is σ = 787467018240. Its totient is φ = 49997813760.

The previous prime is 231305203117. The next prime is 231305203211. The reversal of 231305203140 is 41302503132.

231305203140 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 231305203140.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 329332 + ... + 755691.

It is an arithmetic number, because the mean of its divisors is an integer number (4101390720).

Almost surely, 2^231305203140 is an apocalyptic number.

231305203140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231305203140 is an abundant number, since it is smaller than the sum of its proper divisors (556161815100).

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

231305203140 is a wasteful number, since it uses less digits than its factorization.

231305203140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085082 (or 1085080 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 231305203140 its reverse (41302503132), we get a palindrome (272607706272).

The spelling of 231305203140 in words is "two hundred thirty-one billion, three hundred five million, two hundred three thousand, one hundred forty".