331131312 has 30 divisors (see below), whose sum is σ = 926708172. Its totient is φ = 110377056.

The previous prime is 331131289. The next prime is 331131337. The reversal of 331131312 is 213131133.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1149618 + ... + 1149905.

Almost surely, 2^331131312 is an apocalyptic number.

It is an amenable number.

331131312 is an abundant number, since it is smaller than the sum of its proper divisors (595576860).

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

331131312 is a wasteful number, since it uses less digits than its factorization.

331131312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2299537 (or 2299528 counting only the distinct ones).

The product of its digits is 162, while the sum is 18.

The square root of 331131312 is about 18197.0138209543. The cubic root of 331131312 is about 691.8311036013.

Adding to 331131312 its reverse (213131133), we get a palindrome (544262445).

The spelling of 331131312 in words is "three hundred thirty-one million, one hundred thirty-one thousand, three hundred twelve".