331161132 has 12 divisors (see below), whose sum is σ = 772709336. Its totient is φ = 110387040.

The previous prime is 331161113. The next prime is 331161133. The reversal of 331161132 is 231161133.

It is a tau number, because it is divible by the number of its divisors (12).

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

It is a junction number, because it is equal to n+sod(n) for n = 331161099 and 331161108.

It is not an unprimeable number, because it can be changed into a prime (331161133) 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, 13798369 + ... + 13798392.

Almost surely, 2^331161132 is an apocalyptic number.

It is an amenable number.

331161132 is an abundant number, since it is smaller than the sum of its proper divisors (441548204).

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

331161132 is a wasteful number, since it uses less digits than its factorization.

331161132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27596768 (or 27596766 counting only the distinct ones).

The product of its digits is 324, while the sum is 21.

The square root of 331161132 is about 18197.8331677153. The cubic root of 331161132 is about 691.8518705735.

Subtracting from 331161132 its reverse (231161133), we obtain a palindrome (99999999).

The spelling of 331161132 in words is "three hundred thirty-one million, one hundred sixty-one thousand, one hundred thirty-two".