231434440213440 has 112 divisors (see below), whose sum is σ = 745771576954752. Its totient is φ = 60794718606336.

The previous prime is 231434440213439. The next prime is 231434440213453. The reversal of 231434440213440 is 44312044434132.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1799021814 + ... + 1799150453.

Almost surely, 2^{231434440213440} is an apocalyptic number.

231434440213440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231434440213440 is an abundant number, since it is smaller than the sum of its proper divisors (514337136741312).

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

231434440213440 is a wasteful number, since it uses less digits than its factorization.

231434440213440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3598172354 (or 3598172344 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 39.

Adding to 231434440213440 its reverse (44312044434132), we get a palindrome (275746484647572).

The spelling of 231434440213440 in words is "two hundred thirty-one trillion, four hundred thirty-four billion, four hundred forty million, two hundred thirteen thousand, four hundred forty".