331220411 has 4 divisors (see below), whose sum is σ = 340172352. Its totient is φ = 322268472.

The previous prime is 331220389. The next prime is 331220413. The reversal of 331220411 is 114022133.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331220411 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 331220411.

It is not an unprimeable number, because it can be changed into a prime (331220413) by changing a digit.

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, 4475915 + ... + 4475988.

It is an arithmetic number, because the mean of its divisors is an integer number (85043088).

Almost surely, 2^331220411 is an apocalyptic number.

331220411 is a deficient number, since it is larger than the sum of its proper divisors (8951941).

331220411 is an equidigital number, since it uses as much as digits as its factorization.

331220411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8951940.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 331220411 is about 18199.4618327026. The cubic root of 331220411 is about 691.8931494115.

Adding to 331220411 its reverse (114022133), we get a palindrome (445242544).

The spelling of 331220411 in words is "three hundred thirty-one million, two hundred twenty thousand, four hundred eleven".