231340400340 has 288 divisors, whose sum is σ = 770671117440. Its totient is φ = 51686498304.

The previous prime is 231340400327. The next prime is 231340400363. The reversal of 231340400340 is 43004043132.

It is a self number, because there is not a number n which added to its sum of digits gives 231340400340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 24247291 + ... + 24256829.

It is an arithmetic number, because the mean of its divisors is an integer number (2675941380).

Almost surely, 2^231340400340 is an apocalyptic number.

231340400340 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 231340400340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (385335558720).

231340400340 is an abundant number, since it is smaller than the sum of its proper divisors (539330717100).

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

231340400340 is a wasteful number, since it uses less digits than its factorization.

231340400340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9751 (or 9742 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 231340400340 its reverse (43004043132), we get a palindrome (274344443472).

The spelling of 231340400340 in words is "two hundred thirty-one billion, three hundred forty million, four hundred thousand, three hundred forty".