320533403 has 4 divisors (see below), whose sum is σ = 320650800. Its totient is φ = 320416008.

The previous prime is 320533393. The next prime is 320533417. The reversal of 320533403 is 304335023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304335023 = 2039 ⋅149257.

It is a cyclic number.

It is not a de Polignac number, because 320533403 - 2⁴ = 320533387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320533463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54503 + ... + 60096.

It is an arithmetic number, because the mean of its divisors is an integer number (80162700).

Almost surely, 2^320533403 is an apocalyptic number.

320533403 is a deficient number, since it is larger than the sum of its proper divisors (117397).

320533403 is a wasteful number, since it uses less digits than its factorization.

320533403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117396.

The product of its (nonzero) digits is 3240, while the sum is 23.

The square root of 320533403 is about 17903.4466793408. The cubic root of 320533403 is about 684.3702119943.

Adding to 320533403 its reverse (304335023), we get a palindrome (624868426).

The spelling of 320533403 in words is "three hundred twenty million, five hundred thirty-three thousand, four hundred three".