403243321 has 4 divisors (see below), whose sum is σ = 434262052. Its totient is φ = 372224592.

The previous prime is 403243307. The next prime is 403243333. The reversal of 403243321 is 123342304.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 122345721 + 280897600 = 11061^2 + 16760^2 .

It is a cyclic number.

It is not a de Polignac number, because 403243321 - 2⁹ = 403242809 is a prime.

It is a super-2 number, since 2×403243321² = 325210351862218082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 403243292 and 403243301.

It is not an unprimeable number, because it can be changed into a prime (403243921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15509346 + ... + 15509371.

It is an arithmetic number, because the mean of its divisors is an integer number (108565513).

Almost surely, 2^403243321 is an apocalyptic number.

It is an amenable number.

403243321 is a deficient number, since it is larger than the sum of its proper divisors (31018731).

403243321 is a wasteful number, since it uses less digits than its factorization.

403243321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31018730.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 403243321 is about 20080.9193265647. The cubic root of 403243321 is about 738.7923576291.

Adding to 403243321 its reverse (123342304), we get a palindrome (526585625).

The spelling of 403243321 in words is "four hundred three million, two hundred forty-three thousand, three hundred twenty-one".