331320140 has 48 divisors (see below), whose sum is σ = 742597632. Its totient is φ = 123734016.

The previous prime is 331320137. The next prime is 331320149. The reversal of 331320140 is 41023133.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (331320149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39344 + ... + 47016.

It is an arithmetic number, because the mean of its divisors is an integer number (15470784).

Almost surely, 2^331320140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331320140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (371298816).

331320140 is an abundant number, since it is smaller than the sum of its proper divisors (411277492).

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

331320140 is a wasteful number, since it uses less digits than its factorization.

331320140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7826 (or 7824 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 331320140 is about 18202.2015152014. The cubic root of 331320140 is about 691.9625844316.

Adding to 331320140 its reverse (41023133), we get a palindrome (372343273).

The spelling of 331320140 in words is "three hundred thirty-one million, three hundred twenty thousand, one hundred forty".