331997580 has 72 divisors (see below), whose sum is σ = 1014485472. Its totient is φ = 87879936.

The previous prime is 331997551. The next prime is 331997639. The reversal of 331997580 is 85799133.

It is a happy number.

It is a super-3 number, since 3×331997580³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17929 + ... + 31391.

It is an arithmetic number, because the mean of its divisors is an integer number (14090076).

Almost surely, 2^331997580 is an apocalyptic number.

331997580 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 331997580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (507242736).

331997580 is an abundant number, since it is smaller than the sum of its proper divisors (682487892).

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

331997580 is a wasteful number, since it uses less digits than its factorization.

331997580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13615 (or 13610 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 331997580 is about 18220.8007507903. The cubic root of 331997580 is about 692.4338748349.

The spelling of 331997580 in words is "three hundred thirty-one million, nine hundred ninety-seven thousand, five hundred eighty".