13031205 has 16 divisors (see below), whose sum is σ = 22745664. Its totient is φ = 6318080.

The previous prime is 13031201. The next prime is 13031233. The reversal of 13031205 is 50213031.

It is a happy number.

It is not a de Polignac number, because 13031205 - 2² = 13031201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13031201) 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 15 ways as a sum of consecutive naturals, for example, 39324 + ... + 39653.

It is an arithmetic number, because the mean of its divisors is an integer number (1421604).

Almost surely, 2^13031205 is an apocalyptic number.

13031205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13031205 is a deficient number, since it is larger than the sum of its proper divisors (9714459).

13031205 is a wasteful number, since it uses less digits than its factorization.

13031205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78996.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 13031205 is about 3609.8760366528. The cubic root of 13031205 is about 235.3214553592.

Adding to 13031205 its reverse (50213031), we get a palindrome (63244236).

The spelling of 13031205 in words is "thirteen million, thirty-one thousand, two hundred five".