331530140 has 12 divisors (see below), whose sum is σ = 696213336. Its totient is φ = 132612048.

The previous prime is 331530139. The next prime is 331530167. The reversal of 331530140 is 41035133.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 16576507 = 331530140 / (3 + 3 + 1 + 5 + 3 + 0 + 1 + 4 + 0).

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, 8288234 + ... + 8288273.

It is an arithmetic number, because the mean of its divisors is an integer number (58017778).

Almost surely, 2^331530140 is an apocalyptic number.

It is an amenable number.

331530140 is an abundant number, since it is smaller than the sum of its proper divisors (364683196).

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

331530140 is a wasteful number, since it uses less digits than its factorization.

331530140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16576516 (or 16576514 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 331530140 is about 18207.9691344202. The cubic root of 331530140 is about 692.1087486547.

Adding to 331530140 its reverse (41035133), we get a palindrome (372565273).

The spelling of 331530140 in words is "three hundred thirty-one million, five hundred thirty thousand, one hundred forty".