13031323 has 4 divisors (see below), whose sum is σ = 13160448. Its totient is φ = 12902200.

The previous prime is 13031309. The next prime is 13031329. The reversal of 13031323 is 32313031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32313031 = 101 ⋅319931.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13031323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13031297 and 13031306.

It is not an unprimeable number, because it can be changed into a prime (13031329) 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, 64411 + ... + 64612.

It is an arithmetic number, because the mean of its divisors is an integer number (3290112).

Almost surely, 2^13031323 is an apocalyptic number.

13031323 is a deficient number, since it is larger than the sum of its proper divisors (129125).

13031323 is a wasteful number, since it uses less digits than its factorization.

13031323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129124.

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 13031323 is about 3609.8923806673. The cubic root of 13031323 is about 235.3221656503.

Adding to 13031323 its reverse (32313031), we get a palindrome (45344354).

The spelling of 13031323 in words is "thirteen million, thirty-one thousand, three hundred twenty-three".