331345140 has 96 divisors (see below), whose sum is σ = 1063905024. Its totient is φ = 75479040.

The previous prime is 331345139. The next prime is 331345141. The reversal of 331345140 is 41543133.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (331345139) and next prime (331345141).

It is a self number, because there is not a number n which added to its sum of digits gives 331345140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331345141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140370 + ... + 142710.

It is an arithmetic number, because the mean of its divisors is an integer number (11082344).

Almost surely, 2^331345140 is an apocalyptic number.

331345140 is a gapful number since it is divisible by the number (30) 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 331345140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (531952512).

331345140 is an abundant number, since it is smaller than the sum of its proper divisors (732559884).

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

331345140 is a wasteful number, since it uses less digits than its factorization.

331345140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697 (or 2695 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 331345140 is about 18202.8882323658. Note that the first 3 decimals coincide. The cubic root of 331345140 is about 691.9799881724.

Adding to 331345140 its reverse (41543133), we get a palindrome (372888273).

The spelling of 331345140 in words is "three hundred thirty-one million, three hundred forty-five thousand, one hundred forty".