403243221320 has 32 divisors (see below), whose sum is σ = 929426452920. Its totient is φ = 157363207680.

The previous prime is 403243221289. The next prime is 403243221323. The reversal of 403243221320 is 23122342304.

It can be written as a sum of positive squares in 4 ways, for example, as 156077144356 + 247166076964 = 395066^2 + 497158^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 403243221320.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122938367 + ... + 122941646.

Almost surely, 2^403243221320 is an apocalyptic number.

403243221320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

403243221320 is an abundant number, since it is smaller than the sum of its proper divisors (526183231600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

403243221320 is a wasteful number, since it uses less digits than its factorization.

403243221320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245880065 (or 245880061 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 403243221320 its reverse (23122342304), we get a palindrome (426365563624).

The spelling of 403243221320 in words is "four hundred three billion, two hundred forty-three million, two hundred twenty-one thousand, three hundred twenty".