403243221321 has 16 divisors (see below), whose sum is σ = 597810275200. Its totient is φ = 268643004624.

The previous prime is 403243221289. The next prime is 403243221323. The reversal of 403243221321 is 123122342304.

403243221321 is a `hidden beast` number, since 4 + 0 + 324 + 322 + 13 + 2 + 1 = 666.

It is not a de Polignac number, because 403243221321 - 2⁵ = 403243221289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (403243221323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5121586 + ... + 5199723.

It is an arithmetic number, because the mean of its divisors is an integer number (37363142200).

Almost surely, 2^403243221321 is an apocalyptic number.

It is an amenable number.

403243221321 is a deficient number, since it is larger than the sum of its proper divisors (194567053879).

403243221321 is a wasteful number, since it uses less digits than its factorization.

403243221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10322765 (or 10322759 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 403243221321 its reverse (123122342304), we get a palindrome (526365563625).

The spelling of 403243221321 in words is "four hundred three billion, two hundred forty-three million, two hundred twenty-one thousand, three hundred twenty-one".