320140221 has 8 divisors (see below), whose sum is σ = 428144544. Its totient is φ = 212781360.

The previous prime is 320140211. The next prime is 320140229. The reversal of 320140221 is 122041023.

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

It is not a de Polignac number, because 320140221 - 2¹⁵ = 320107453 is a prime.

It is a super-2 number, since 2×320140221² = 204979522203857682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 320140221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320140229) 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, 160206 + ... + 162191.

It is an arithmetic number, because the mean of its divisors is an integer number (53518068).

Almost surely, 2^320140221 is an apocalyptic number.

It is an amenable number.

320140221 is a deficient number, since it is larger than the sum of its proper divisors (108004323).

320140221 is a wasteful number, since it uses less digits than its factorization.

320140221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322731.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 320140221 is about 17892.4626868411. The cubic root of 320140221 is about 684.0902701388.

Adding to 320140221 its reverse (122041023), we get a palindrome (442181244).

The spelling of 320140221 in words is "three hundred twenty million, one hundred forty thousand, two hundred twenty-one".