331020242 has 16 divisors (see below), whose sum is σ = 597330240. Its totient is φ = 134399088.

The previous prime is 331020233. The next prime is 331020257. The reversal of 331020242 is 242020133.

It is a super-2 number, since 2×331020242² = 219148801227477128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 331020242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621953 + ... + 622484.

It is an arithmetic number, because the mean of its divisors is an integer number (37333140).

Almost surely, 2^331020242 is an apocalyptic number.

331020242 is a deficient number, since it is larger than the sum of its proper divisors (266309998).

331020242 is a wasteful number, since it uses less digits than its factorization.

331020242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244465.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 331020242 is about 18193.9616906269. The cubic root of 331020242 is about 691.7537422736.

Adding to 331020242 its reverse (242020133), we get a palindrome (573040375).

The spelling of 331020242 in words is "three hundred thirty-one million, twenty thousand, two hundred forty-two".