320625221 has 8 divisors (see below), whose sum is σ = 382360704. Its totient is φ = 262872720.

The previous prime is 320625199. The next prime is 320625223. The reversal of 320625221 is 122526023.

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

It is a cyclic number.

It is not a de Polignac number, because 320625221 - 2¹⁴ = 320608837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320625223) 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 7 ways as a sum of consecutive naturals, for example, 995570 + ... + 995891.

It is an arithmetic number, because the mean of its divisors is an integer number (47795088).

Almost surely, 2^320625221 is an apocalyptic number.

It is an amenable number.

320625221 is a deficient number, since it is larger than the sum of its proper divisors (61735483).

320625221 is a wasteful number, since it uses less digits than its factorization.

320625221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991491.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 320625221 is about 17906.0107505832. The cubic root of 320625221 is about 684.4355525636.

The spelling of 320625221 in words is "three hundred twenty million, six hundred twenty-five thousand, two hundred twenty-one".