331321040 has 20 divisors (see below), whose sum is σ = 770321604. Its totient is φ = 132528384.

The previous prime is 331321033. The next prime is 331321061. The reversal of 331321040 is 40123133.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 85082176 + 246238864 = 9224^2 + 15692^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2070677 + ... + 2070836.

Almost surely, 2^331321040 is an apocalyptic number.

It is an amenable number.

331321040 is an abundant number, since it is smaller than the sum of its proper divisors (439000564).

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

331321040 is a wasteful number, since it uses less digits than its factorization.

331321040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4141526 (or 4141520 counting only the distinct ones).

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

The square root of 331321040 is about 18202.2262374689. The cubic root of 331321040 is about 691.9632109815.

Adding to 331321040 its reverse (40123133), we get a palindrome (371444173).

The spelling of 331321040 in words is "three hundred thirty-one million, three hundred twenty-one thousand, forty".