320421153 has 32 divisors (see below), whose sum is σ = 471905280. Its totient is φ = 192179520.

The previous prime is 320421133. The next prime is 320421161. The reversal of 320421153 is 351124023.

It is not a de Polignac number, because 320421153 - 2⁶ = 320421089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320421103) 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 31 ways as a sum of consecutive naturals, for example, 300900 + ... + 301962.

It is an arithmetic number, because the mean of its divisors is an integer number (14747040).

Almost surely, 2^320421153 is an apocalyptic number.

It is an amenable number.

320421153 is a deficient number, since it is larger than the sum of its proper divisors (151484127).

320421153 is a wasteful number, since it uses less digits than its factorization.

320421153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 320421153 is about 17900.3115336019. The cubic root of 320421153 is about 684.2903144186.

Adding to 320421153 its reverse (351124023), we get a palindrome (671545176).

The spelling of 320421153 in words is "three hundred twenty million, four hundred twenty-one thousand, one hundred fifty-three".