31320324403 has 4 divisors (see below), whose sum is σ = 31326213688. Its totient is φ = 31314435120.

The previous prime is 31320324397. The next prime is 31320324421. The reversal of 31320324403 is 30442302313.

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

It is a cyclic number.

It is not a de Polignac number, because 31320324403 - 2²¹ = 31318227251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31320324433) 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 3 ways as a sum of consecutive naturals, for example, 2936658 + ... + 2947303.

It is an arithmetic number, because the mean of its divisors is an integer number (7831553422).

Almost surely, 2^31320324403 is an apocalyptic number.

31320324403 is a deficient number, since it is larger than the sum of its proper divisors (5889285).

31320324403 is an equidigital number, since it uses as much as digits as its factorization.

31320324403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5889284.

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 31320324403 its reverse (30442302313), we get a palindrome (61762626716).

The spelling of 31320324403 in words is "thirty-one billion, three hundred twenty million, three hundred twenty-four thousand, four hundred three".