331323313053221 has 4 divisors (see below), whose sum is σ = 335861988574572. Its totient is φ = 326784637531872.

The previous prime is 331323313053169. The next prime is 331323313053223. The reversal of 331323313053221 is 122350313323133.

It is a happy number.

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 284550981712321 + 46772331340900 = 16868639^2 + 6839030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331323313053221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331323313053223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2269337760566 + ... + 2269337760711.

It is an arithmetic number, because the mean of its divisors is an integer number (83965497143643).

Almost surely, 2^{331323313053221} is an apocalyptic number.

It is an amenable number.

331323313053221 is a deficient number, since it is larger than the sum of its proper divisors (4538675521351).

331323313053221 is an equidigital number, since it uses as much as digits as its factorization.

331323313053221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4538675521350.

The product of its (nonzero) digits is 87480, while the sum is 35.

Adding to 331323313053221 its reverse (122350313323133), we get a palindrome (453673626376354).

The spelling of 331323313053221 in words is "three hundred thirty-one trillion, three hundred twenty-three billion, three hundred thirteen million, fifty-three thousand, two hundred twenty-one".