13136531 has 2 divisors, whose sum is σ = 13136532. Its totient is φ = 13136530.

The previous prime is 13136509. The next prime is 13136537. The reversal of 13136531 is 13563131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13136531 - 2¹⁸ = 12874387 is a prime.

It is a super-2 number, since 2×13136531² = 345136893427922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13136497 and 13136506.

It is not a weakly prime, because it can be changed into another prime (13136537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6568265 + 6568266.

It is an arithmetic number, because the mean of its divisors is an integer number (6568266).

Almost surely, 2^13136531 is an apocalyptic number.

13136531 is a deficient number, since it is larger than the sum of its proper divisors (1).

13136531 is an equidigital number, since it uses as much as digits as its factorization.

13136531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 810, while the sum is 23.

The square root of 13136531 is about 3624.4352663553. The cubic root of 13136531 is about 235.9537578172.

Adding to 13136531 its reverse (13563131), we get a palindrome (26699662).

The spelling of 13136531 in words is "thirteen million, one hundred thirty-six thousand, five hundred thirty-one".