331432140 has 48 divisors (see below), whose sum is σ = 999397728. Its totient is φ = 81583104.

The previous prime is 331432133. The next prime is 331432141. The reversal of 331432140 is 41234133.

It is not an unprimeable number, because it can be changed into a prime (331432141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211677 + ... + 213236.

It is an arithmetic number, because the mean of its divisors is an integer number (20820786).

Almost surely, 2^331432140 is an apocalyptic number.

331432140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331432140 is an abundant number, since it is smaller than the sum of its proper divisors (667965588).

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

331432140 is a wasteful number, since it uses less digits than its factorization.

331432140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424938 (or 424936 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 331432140 is about 18205.2778061748. The cubic root of 331432140 is about 692.0405463674.

Adding to 331432140 its reverse (41234133), we get a palindrome (372666273).

The spelling of 331432140 in words is "three hundred thirty-one million, four hundred thirty-two thousand, one hundred forty".