331155442 has 8 divisors (see below), whose sum is σ = 508848732. Its totient is φ = 161539200.

The previous prime is 331155367. The next prime is 331155457. The reversal of 331155442 is 244551133.

331155442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 253733041 + 77422401 = 15929^2 + 8799^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 331155442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2019159 + ... + 2019322.

Almost surely, 2^331155442 is an apocalyptic number.

331155442 is a deficient number, since it is larger than the sum of its proper divisors (177693290).

331155442 is a wasteful number, since it uses less digits than its factorization.

331155442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4038524.

The product of its digits is 7200, while the sum is 28.

The square root of 331155442 is about 18197.6768297495. The cubic root of 331155442 is about 691.8479080919.

The spelling of 331155442 in words is "three hundred thirty-one million, one hundred fifty-five thousand, four hundred forty-two".