321656241 has 4 divisors (see below), whose sum is σ = 428874992. Its totient is φ = 214437492.

The previous prime is 321656191. The next prime is 321656287. The reversal of 321656241 is 142656123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 321656241 - 2⁹ = 321655729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321656199 and 321656208.

It is not an unprimeable number, because it can be changed into a prime (321651241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53609371 + ... + 53609376.

It is an arithmetic number, because the mean of its divisors is an integer number (107218748).

Almost surely, 2^321656241 is an apocalyptic number.

It is an amenable number.

321656241 is a deficient number, since it is larger than the sum of its proper divisors (107218751).

321656241 is a wasteful number, since it uses less digits than its factorization.

321656241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107218750.

The product of its digits is 8640, while the sum is 30.

The square root of 321656241 is about 17934.7774170743. Note that the first 3 decimals coincide. The cubic root of 321656241 is about 685.1684037266.

The spelling of 321656241 in words is "three hundred twenty-one million, six hundred fifty-six thousand, two hundred forty-one".