331223040 has 208 divisors, whose sum is σ = 1179504000. Its totient is φ = 88178688.

The previous prime is 331223017. The next prime is 331223041. The reversal of 331223040 is 40322133.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (331223041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 552661 + ... + 553259.

Almost surely, 2^331223040 is an apocalyptic number.

331223040 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 331223040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (589752000).

331223040 is an abundant number, since it is smaller than the sum of its proper divisors (848280960).

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

331223040 is an equidigital number, since it uses as much as digits as its factorization.

331223040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637 (or 609 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 331223040 is about 18199.5340599698. The cubic root of 331223040 is about 691.8949799975.

Adding to 331223040 its reverse (40322133), we get a palindrome (371545173).

The spelling of 331223040 in words is "three hundred thirty-one million, two hundred twenty-three thousand, forty".