321722242645 has 16 divisors (see below), whose sum is σ = 386715651840. Its totient is φ = 256945322304.

The previous prime is 321722242643. The next prime is 321722242661. The reversal of 321722242645 is 546242227123.

It is a cyclic number.

It is not a de Polignac number, because 321722242645 - 2¹ = 321722242643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321722242598 and 321722242607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321722242643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24133972 + ... + 24147298.

It is an arithmetic number, because the mean of its divisors is an integer number (24169728240).

Almost surely, 2^321722242645 is an apocalyptic number.

It is an amenable number.

321722242645 is a deficient number, since it is larger than the sum of its proper divisors (64993409195).

321722242645 is a wasteful number, since it uses less digits than its factorization.

321722242645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21084.

The product of its digits is 322560, while the sum is 40.

Adding to 321722242645 its reverse (546242227123), we get a palindrome (867964469768).

The spelling of 321722242645 in words is "three hundred twenty-one billion, seven hundred twenty-two million, two hundred forty-two thousand, six hundred forty-five".