13320031 has 4 divisors (see below), whose sum is σ = 13334464. Its totient is φ = 13305600.

The previous prime is 13320029. The next prime is 13320071. The reversal of 13320031 is 13002331.

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 13320031 - 2¹ = 13320029 is a prime.

It is a super-2 number, since 2×13320031² = 354846451681922, 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 = 13319993 and 13320020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13320001) 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, 5730 + ... + 7711.

It is an arithmetic number, because the mean of its divisors is an integer number (3333616).

Almost surely, 2^13320031 is an apocalyptic number.

13320031 is a deficient number, since it is larger than the sum of its proper divisors (14433).

13320031 is an equidigital number, since it uses as much as digits as its factorization.

13320031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14432.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 13320031 is about 3649.6617651503. The cubic root of 13320031 is about 237.0473357592.

Adding to 13320031 its reverse (13002331), we get a palindrome (26322362).

It can be divided in two parts, 133 and 20031, that added together give a square (20164 = 142²).

The spelling of 13320031 in words is "thirteen million, three hundred twenty thousand, thirty-one".