331897132 has 24 divisors (see below), whose sum is σ = 679986720. Its totient is φ = 138771840.

The previous prime is 331897123. The next prime is 331897133. The reversal of 331897132 is 231798133.

It is a super-2 number, since 2×331897132² = 220311412459650848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331897091 and 331897100.

It is not an unprimeable number, because it can be changed into a prime (331897133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143407 + ... + 145702.

It is an arithmetic number, because the mean of its divisors is an integer number (28332780).

Almost surely, 2^331897132 is an apocalyptic number.

It is an amenable number.

331897132 is an abundant number, since it is smaller than the sum of its proper divisors (348089588).

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

331897132 is a wasteful number, since it uses less digits than its factorization.

331897132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289161 (or 289159 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The square root of 331897132 is about 18218.0441321235. The cubic root of 331897132 is about 692.3640343522.

The spelling of 331897132 in words is "three hundred thirty-one million, eight hundred ninety-seven thousand, one hundred thirty-two".