331342320 has 160 divisors (see below), whose sum is σ = 1063931904. Its totient is φ = 85248000.

The previous prime is 331342259. The next prime is 331342321. The reversal of 331342320 is 23243133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331342321) 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, 1485729 + ... + 1485951.

Almost surely, 2^331342320 is an apocalyptic number.

331342320 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 331342320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (531965952).

331342320 is an abundant number, since it is smaller than the sum of its proper divisors (732589584).

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

331342320 is a wasteful number, since it uses less digits than its factorization.

331342320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

The square root of 331342320 is about 18202.8107719660. The cubic root of 331342320 is about 691.9780250743.

Adding to 331342320 its reverse (23243133), we get a palindrome (354585453).

The spelling of 331342320 in words is "three hundred thirty-one million, three hundred forty-two thousand, three hundred twenty".