331481520 has 240 divisors, whose sum is σ = 1195227072. Its totient is φ = 82114560.

The previous prime is 331481489. The next prime is 331481531. The reversal of 331481520 is 25184133.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 612450 + ... + 612990.

Almost surely, 2^331481520 is an apocalyptic number.

331481520 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 331481520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (597613536).

331481520 is an abundant number, since it is smaller than the sum of its proper divisors (863745552).

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

331481520 is a wasteful number, since it uses less digits than its factorization.

331481520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 331481520 is about 18206.6339557866. The cubic root of 331481520 is about 692.0749136491.

The spelling of 331481520 in words is "three hundred thirty-one million, four hundred eighty-one thousand, five hundred twenty".