331005140 has 24 divisors (see below), whose sum is σ = 708228360. Its totient is φ = 129903488.

The previous prime is 331005133. The next prime is 331005173. The reversal of 331005140 is 41500133.

It can be written as a sum of positive squares in 4 ways, for example, as 10523536 + 320481604 = 3244^2 + 17902^2 .

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 7 ways as a sum of consecutive naturals, for example, 155075 + ... + 157194.

It is an arithmetic number, because the mean of its divisors is an integer number (29509515).

Almost surely, 2^331005140 is an apocalyptic number.

It is an amenable number.

331005140 is an abundant number, since it is smaller than the sum of its proper divisors (377223220).

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

331005140 is a wasteful number, since it uses less digits than its factorization.

331005140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312331 (or 312329 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 331005140 is about 18193.5466580873. The cubic root of 331005140 is about 691.7432222484.

Adding to 331005140 its reverse (41500133), we get a palindrome (372505273).

The spelling of 331005140 in words is "three hundred thirty-one million, five thousand, one hundred forty".