331143040 has 32 divisors (see below), whose sum is σ = 791640360. Its totient is φ = 132456960.

The previous prime is 331142971. The next prime is 331143047. The reversal of 331143040 is 40341133.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 331142999 and 331143017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331143047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258066 + ... + 259345.

Almost surely, 2^331143040 is an apocalyptic number.

It is an amenable number.

331143040 is an abundant number, since it is smaller than the sum of its proper divisors (460497320).

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

331143040 is an equidigital number, since it uses as much as digits as its factorization.

331143040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517430 (or 517418 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 331143040 is about 18197.3360687767. The cubic root of 331143040 is about 691.8392712568.

Adding to 331143040 its reverse (40341133), we get a palindrome (371484173).

The spelling of 331143040 in words is "three hundred thirty-one million, one hundred forty-three thousand, forty".