231241202140 has 192 divisors, whose sum is σ = 551356968960. Its totient is φ = 80897080320.

The previous prime is 231241202113. The next prime is 231241202147. The reversal of 231241202140 is 41202142132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231241202147) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 56688621 + ... + 56692699.

It is an arithmetic number, because the mean of its divisors is an integer number (2871650880).

Almost surely, 2^231241202140 is an apocalyptic number.

231241202140 is a gapful number since it is divisible by the number (20) 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 231241202140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275678484480).

231241202140 is an abundant number, since it is smaller than the sum of its proper divisors (320115766820).

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

231241202140 is a wasteful number, since it uses less digits than its factorization.

231241202140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4292 (or 4290 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 231241202140 its reverse (41202142132), we get a palindrome (272443344272).

The spelling of 231241202140 in words is "two hundred thirty-one billion, two hundred forty-one million, two hundred two thousand, one hundred forty".