331220441 has 2 divisors, whose sum is σ = 331220442. Its totient is φ = 331220440.

The previous prime is 331220431. The next prime is 331220453. The reversal of 331220441 is 144022133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 331094416 + 126025 = 18196^2 + 355^2 .

It is an emirp because it is prime and its reverse (144022133) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331220441 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (331220431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165610220 + 165610221.

It is an arithmetic number, because the mean of its divisors is an integer number (165610221).

Almost surely, 2^331220441 is an apocalyptic number.

It is an amenable number.

331220441 is a deficient number, since it is larger than the sum of its proper divisors (1).

331220441 is an equidigital number, since it uses as much as digits as its factorization.

331220441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 331220441 is about 18199.4626569028. The cubic root of 331220441 is about 691.8931703007.

Adding to 331220441 its reverse (144022133), we get a palindrome (475242574).

The spelling of 331220441 in words is "three hundred thirty-one million, two hundred twenty thousand, four hundred forty-one".