331442401 has 4 divisors (see below), whose sum is σ = 339526404. Its totient is φ = 323358400.

The previous prime is 331442399. The next prime is 331442417. The reversal of 331442401 is 104244133.

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

It can be written as a sum of positive squares in 2 ways, for example, as 88830625 + 242611776 = 9425^2 + 15576^2 .

It is a cyclic number.

It is not a de Polignac number, because 331442401 - 2¹ = 331442399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331442431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4041940 + ... + 4042021.

It is an arithmetic number, because the mean of its divisors is an integer number (84881601).

Almost surely, 2^331442401 is an apocalyptic number.

It is an amenable number.

331442401 is a deficient number, since it is larger than the sum of its proper divisors (8084003).

331442401 is an equidigital number, since it uses as much as digits as its factorization.

331442401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8084002.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 331442401 is about 18205.5596178750. The cubic root of 331442401 is about 692.0476880553.

Adding to 331442401 its reverse (104244133), we get a palindrome (435686534).

The spelling of 331442401 in words is "three hundred thirty-one million, four hundred forty-two thousand, four hundred one".