331020241 has 4 divisors (see below), whose sum is σ = 339966772. Its totient is φ = 322073712.

The previous prime is 331020233. The next prime is 331020257. The reversal of 331020241 is 142020133.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 142020133 = 109 ⋅1302937.

It can be written as a sum of positive squares in 2 ways, for example, as 134908225 + 196112016 = 11615^2 + 14004^2 .

It is a cyclic number.

It is not a de Polignac number, because 331020241 - 2³ = 331020233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331020271) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4473210 + ... + 4473283.

It is an arithmetic number, because the mean of its divisors is an integer number (84991693).

Almost surely, 2^331020241 is an apocalyptic number.

It is an amenable number.

331020241 is a deficient number, since it is larger than the sum of its proper divisors (8946531).

331020241 is an equidigital number, since it uses as much as digits as its factorization.

331020241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8946530.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 331020241 is about 18193.9616631453. The cubic root of 331020241 is about 691.7537415770.

Adding to 331020241 its reverse (142020133), we get a palindrome (473040374).

The spelling of 331020241 in words is "three hundred thirty-one million, twenty thousand, two hundred forty-one".