4000343231320 has 64 divisors (see below), whose sum is σ = 9024810009120. Its totient is φ = 1595868954624.

The previous prime is 4000343231251. The next prime is 4000343231341. The reversal of 4000343231320 is 231323430004.

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, 25610979 + ... + 25766701.

Almost surely, 2^{4000343231320} is an apocalyptic number.

4000343231320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4000343231320 is an abundant number, since it is smaller than the sum of its proper divisors (5024466777800).

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

4000343231320 is a wasteful number, since it uses less digits than its factorization.

4000343231320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157444 (or 157440 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 4000343231320 its reverse (231323430004), we get a palindrome (4231666661324).

The spelling of 4000343231320 in words is "four trillion, three hundred forty-three million, two hundred thirty-one thousand, three hundred twenty".