13031725 has 24 divisors (see below), whose sum is σ = 18659520. Its totient is φ = 8843520.

The previous prime is 13031723. The next prime is 13031771. The reversal of 13031725 is 52713031.

It is not a de Polignac number, because 13031725 - 2¹ = 13031723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13031696 and 13031705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13031723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19446 + ... + 20104.

It is an arithmetic number, because the mean of its divisors is an integer number (777480).

Almost surely, 2^13031725 is an apocalyptic number.

It is an amenable number.

13031725 is a deficient number, since it is larger than the sum of its proper divisors (5627795).

13031725 is a wasteful number, since it uses less digits than its factorization.

13031725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789 (or 784 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 13031725 is about 3609.9480605682. The cubic root of 13031725 is about 235.3245854235.

Adding to 13031725 its reverse (52713031), we get a palindrome (65744756).

The spelling of 13031725 in words is "thirteen million, thirty-one thousand, seven hundred twenty-five".