136081531 has 2 divisors, whose sum is σ = 136081532. Its totient is φ = 136081530.

The previous prime is 136081507. The next prime is 136081559. The reversal of 136081531 is 135180631.

It is an a-pointer prime, because the next prime (136081559) can be obtained adding 136081531 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136081531 - 2⁵ = 136081499 is a prime.

It is a super-2 number, since 2×136081531² = 37036366158607922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 136081531.

It is not a weakly prime, because it can be changed into another prime (136085531) 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 as a sum of consecutive naturals, namely, 68040765 + 68040766.

It is an arithmetic number, because the mean of its divisors is an integer number (68040766).

Almost surely, 2^136081531 is an apocalyptic number.

136081531 is a deficient number, since it is larger than the sum of its proper divisors (1).

136081531 is an equidigital number, since it uses as much as digits as its factorization.

136081531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 136081531 is about 11665.3988787354. The cubic root of 136081531 is about 514.3590618968.

The spelling of 136081531 in words is "one hundred thirty-six million, eighty-one thousand, five hundred thirty-one".