331324340221 has 48 divisors (see below), whose sum is σ = 405662629680. Its totient is φ = 269426304000.

The previous prime is 331324340183. The next prime is 331324340239. The reversal of 331324340221 is 122043423133.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1832268025 + 329492072196 = 42805^2 + 574014^2 .

It is not a de Polignac number, because 331324340221 - 2¹¹ = 331324338173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 331324340221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331324340251) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 149176891 + ... + 149179111.

It is an arithmetic number, because the mean of its divisors is an integer number (8451304785).

Almost surely, 2^331324340221 is an apocalyptic number.

It is an amenable number.

331324340221 is a deficient number, since it is larger than the sum of its proper divisors (74338289459).

331324340221 is a wasteful number, since it uses less digits than its factorization.

331324340221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4046 (or 4039 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 331324340221 its reverse (122043423133), we get a palindrome (453367763354).

The spelling of 331324340221 in words is "three hundred thirty-one billion, three hundred twenty-four million, three hundred forty thousand, two hundred twenty-one".