131613535 has 16 divisors (see below), whose sum is σ = 160022016. Its totient is φ = 103910688.

The previous prime is 131613523. The next prime is 131613553. The reversal of 131613535 is 535316131.

It is a cyclic number.

It is not a de Polignac number, because 131613535 - 2¹⁹ = 131089247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135622 + ... + 136588.

It is an arithmetic number, because the mean of its divisors is an integer number (10001376).

Almost surely, 2^131613535 is an apocalyptic number.

131613535 is a deficient number, since it is larger than the sum of its proper divisors (28408481).

131613535 is a wasteful number, since it uses less digits than its factorization.

131613535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302.

The product of its digits is 4050, while the sum is 28.

The square root of 131613535 is about 11472.2942343718. The cubic root of 131613535 is about 508.6669467017. Note that the first 3 decimals are identical.

Adding to 131613535 its reverse (535316131), we get a palindrome (666929666).

The spelling of 131613535 in words is "one hundred thirty-one million, six hundred thirteen thousand, five hundred thirty-five".