13131535 has 4 divisors (see below), whose sum is σ = 15757848. Its totient is φ = 10505224.

The previous prime is 13131529. The next prime is 13131541. The reversal of 13131535 is 53513131.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (13131529) and next prime (13131541).

It is a cyclic number.

It is not a de Polignac number, because 13131535 - 2⁷ = 13131407 is a prime.

It is a super-2 number, since 2×13131535² = 344874422912450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1313149 + ... + 1313158.

It is an arithmetic number, because the mean of its divisors is an integer number (3939462).

Almost surely, 2^13131535 is an apocalyptic number.

13131535 is a deficient number, since it is larger than the sum of its proper divisors (2626313).

13131535 is an equidigital number, since it uses as much as digits as its factorization.

13131535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2626312.

The product of its digits is 675, while the sum is 22.

The square root of 13131535 is about 3623.7459899943. The cubic root of 13131535 is about 235.9238418917.

Adding to 13131535 its reverse (53513131), we get a palindrome (66644666).

The spelling of 13131535 in words is "thirteen million, one hundred thirty-one thousand, five hundred thirty-five".