331311132 has 36 divisors (see below), whose sum is σ = 881560680. Its totient is φ = 104624352.

The previous prime is 331311077. The next prime is 331311143. The reversal of 331311132 is 231113133.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 241503 + ... + 242870.

Almost surely, 2^331311132 is an apocalyptic number.

It is an amenable number.

331311132 is an abundant number, since it is smaller than the sum of its proper divisors (550249548).

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

331311132 is a wasteful number, since it uses less digits than its factorization.

331311132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484402 (or 484397 counting only the distinct ones).

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

The square root of 331311132 is about 18201.9540709233. The cubic root of 331311132 is about 691.9563133012.

Adding to 331311132 its reverse (231113133), we get a palindrome (562424265).

The spelling of 331311132 in words is "three hundred thirty-one million, three hundred eleven thousand, one hundred thirty-two".