321020413 has 24 divisors (see below), whose sum is σ = 385028160. Its totient is φ = 266716800.

The previous prime is 321020363. The next prime is 321020489. The reversal of 321020413 is 314020123.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-321020413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321020813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 317653 + ... + 318661.

It is an arithmetic number, because the mean of its divisors is an integer number (16042840).

Almost surely, 2^321020413 is an apocalyptic number.

It is an amenable number.

321020413 is a deficient number, since it is larger than the sum of its proper divisors (64007747).

321020413 is a wasteful number, since it uses less digits than its factorization.

321020413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217 (or 1210 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 321020413 is about 17917.0425293908. The cubic root of 321020413 is about 684.7166412861.

Adding to 321020413 its reverse (314020123), we get a palindrome (635040536).

The spelling of 321020413 in words is "three hundred twenty-one million, twenty thousand, four hundred thirteen".