331613242 has 4 divisors (see below), whose sum is σ = 497419866. Its totient is φ = 165806620.

The previous prime is 331613201. The next prime is 331613393. The reversal of 331613242 is 242316133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242316133 = 3313 ⋅73141.

It can be written as a sum of positive squares in only one way, i.e., 282206401 + 49406841 = 16799^2 + 7029^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82903309 + ... + 82903312.

Almost surely, 2^331613242 is an apocalyptic number.

331613242 is a deficient number, since it is larger than the sum of its proper divisors (165806624).

331613242 is a wasteful number, since it uses less digits than its factorization.

331613242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165806623.

The product of its digits is 2592, while the sum is 25.

The square root of 331613242 is about 18210.2510141953. The cubic root of 331613242 is about 692.1665722724.

Adding to 331613242 its reverse (242316133), we get a palindrome (573929375).

The spelling of 331613242 in words is "three hundred thirty-one million, six hundred thirteen thousand, two hundred forty-two".