320213421 has 24 divisors (see below), whose sum is σ = 505155456. Its totient is φ = 193847040.

The previous prime is 320213417. The next prime is 320213431. The reversal of 320213421 is 124312023.

320213421 is a `hidden beast` number, since 32 + 0 + 213 + 421 = 666.

It is not a de Polignac number, because 320213421 - 2² = 320213417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320213394 and 320213403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320213431) 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 23 ways as a sum of consecutive naturals, for example, 139741 + ... + 142013.

It is an arithmetic number, because the mean of its divisors is an integer number (21048144).

Almost surely, 2^320213421 is an apocalyptic number.

It is an amenable number.

320213421 is a deficient number, since it is larger than the sum of its proper divisors (184942035).

320213421 is a wasteful number, since it uses less digits than its factorization.

320213421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3713 (or 3710 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 320213421 is about 17894.5081240027. The cubic root of 320213421 is about 684.1424052017.

Adding to 320213421 its reverse (124312023), we get a palindrome (444525444).

The spelling of 320213421 in words is "three hundred twenty million, two hundred thirteen thousand, four hundred twenty-one".