331613532 has 18 divisors (see below), whose sum is σ = 838245408. Its totient is φ = 110537832.

The previous prime is 331613497. The next prime is 331613533. The reversal of 331613532 is 235316133.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 331613496 and 331613505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331613533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4605708 + ... + 4605779.

Almost surely, 2^331613532 is an apocalyptic number.

It is an amenable number.

331613532 is an abundant number, since it is smaller than the sum of its proper divisors (506631876).

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

331613532 is a wasteful number, since it uses less digits than its factorization.

331613532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9211497 (or 9211492 counting only the distinct ones).

The product of its digits is 4860, while the sum is 27.

The square root of 331613532 is about 18210.2589767417. The cubic root of 331613532 is about 692.1667740419.

Adding to 331613532 its reverse (235316133), we get a palindrome (566929665).

The spelling of 331613532 in words is "three hundred thirty-one million, six hundred thirteen thousand, five hundred thirty-two".