13231535 has 8 divisors (see below), whose sum is σ = 15909696. Its totient is φ = 10564000.

The previous prime is 13231531. The next prime is 13231553. The reversal of 13231535 is 53513231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13231535 - 2² = 13231531 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13231535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13231531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410 + ... + 5160.

It is an arithmetic number, because the mean of its divisors is an integer number (1988712).

Almost surely, 2^13231535 is an apocalyptic number.

13231535 is a deficient number, since it is larger than the sum of its proper divisors (2678161).

13231535 is an equidigital number, since it uses as much as digits as its factorization.

13231535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5313.

The product of its digits is 1350, while the sum is 23.

The square root of 13231535 is about 3637.5176975514. The cubic root of 13231535 is about 236.5212015791.

Adding to 13231535 its reverse (53513231), we get a palindrome (66744766).

The spelling of 13231535 in words is "thirteen million, two hundred thirty-one thousand, five hundred thirty-five".