321223641 has 8 divisors (see below), whose sum is σ = 428382240. Its totient is φ = 214107072.

The previous prime is 321223597. The next prime is 321223649. The reversal of 321223641 is 146322123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 321223641 - 2¹⁰ = 321222617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321223649) 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 7 ways as a sum of consecutive naturals, for example, 19906 + ... + 32228.

It is an arithmetic number, because the mean of its divisors is an integer number (53547780).

Almost surely, 2^321223641 is an apocalyptic number.

It is an amenable number.

321223641 is a deficient number, since it is larger than the sum of its proper divisors (107158599).

321223641 is a wasteful number, since it uses less digits than its factorization.

321223641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21015.

The product of its digits is 1728, while the sum is 24.

The square root of 321223641 is about 17922.7129921784. The cubic root of 321223641 is about 684.8611017146.

Adding to 321223641 its reverse (146322123), we get a palindrome (467545764).

The spelling of 321223641 in words is "three hundred twenty-one million, two hundred twenty-three thousand, six hundred forty-one".