331402243455221 has 16 divisors (see below), whose sum is σ = 352142246171520. Its totient is φ = 311880020966080.

The previous prime is 331402243455181. The next prime is 331402243455223. The reversal of 331402243455221 is 122554342204133.

It is not a de Polignac number, because 331402243455221 - 2¹⁴ = 331402243438837 is a prime.

It is a super-3 number, since 3×331402243455221³ (a number of 45 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331402243455223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51863960 + ... + 57902286.

It is an arithmetic number, because the mean of its divisors is an integer number (22008890385720).

Almost surely, 2^{331402243455221} is an apocalyptic number.

It is an amenable number.

331402243455221 is a deficient number, since it is larger than the sum of its proper divisors (20740002716299).

331402243455221 is an equidigital number, since it uses as much as digits as its factorization.

331402243455221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6049549 (or 6049515 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 41.

Adding to 331402243455221 its reverse (122554342204133), we get a palindrome (453956585659354).

The spelling of 331402243455221 in words is "three hundred thirty-one trillion, four hundred two billion, two hundred forty-three million, four hundred fifty-five thousand, two hundred twenty-one".