321220341 has 12 divisors (see below), whose sum is σ = 499676268. Its totient is φ = 197673984.

The previous prime is 321220307. The next prime is 321220343. The reversal of 321220341 is 143022123.

321220341 is a `hidden beast` number, since 321 + 2 + 2 + 0 + 341 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 131194116 + 190026225 = 11454^2 + 13785^2 .

It is not a de Polignac number, because 321220341 - 2²² = 317026037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321220343) 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 11 ways as a sum of consecutive naturals, for example, 1372620 + ... + 1372853.

It is an arithmetic number, because the mean of its divisors is an integer number (41639689).

Almost surely, 2^321220341 is an apocalyptic number.

It is an amenable number.

321220341 is a deficient number, since it is larger than the sum of its proper divisors (178455927).

321220341 is a wasteful number, since it uses less digits than its factorization.

321220341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2745492 (or 2745489 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 321220341 is about 17922.6209299868. The cubic root of 321220341 is about 684.8587564645.

Adding to 321220341 its reverse (143022123), we get a palindrome (464242464).

The spelling of 321220341 in words is "three hundred twenty-one million, two hundred twenty thousand, three hundred forty-one".