231213682140 has 192 divisors, whose sum is σ = 752149601280. Its totient is φ = 51979898880.

The previous prime is 231213682103. The next prime is 231213682157. The reversal of 231213682140 is 41286312132.

It is a congruent number.

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, 6198666 + ... + 6235854.

It is an arithmetic number, because the mean of its divisors is an integer number (3917445840).

Almost surely, 2^231213682140 is an apocalyptic number.

231213682140 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 231213682140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (376074800640).

231213682140 is an abundant number, since it is smaller than the sum of its proper divisors (520935919140).

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

231213682140 is a wasteful number, since it uses less digits than its factorization.

231213682140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37452 (or 37450 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

Adding to 231213682140 its reverse (41286312132), we get a palindrome (272499994272).

The spelling of 231213682140 in words is "two hundred thirty-one billion, two hundred thirteen million, six hundred eighty-two thousand, one hundred forty".