136531771 has 4 divisors (see below), whose sum is σ = 136711944. Its totient is φ = 136351600.

The previous prime is 136531741. The next prime is 136531783. The reversal of 136531771 is 177135631.

136531771 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 177135631 = 17 ⋅10419743.

It is a cyclic number.

It is not a de Polignac number, because 136531771 - 2⁷ = 136531643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136531741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88945 + ... + 90466.

It is an arithmetic number, because the mean of its divisors is an integer number (34177986).

Almost surely, 2^136531771 is an apocalyptic number.

136531771 is a deficient number, since it is larger than the sum of its proper divisors (180173).

136531771 is an equidigital number, since it uses as much as digits as its factorization.

136531771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180172.

The product of its digits is 13230, while the sum is 34.

The square root of 136531771 is about 11684.6810397203. The cubic root of 136531771 is about 514.9257076985.

The spelling of 136531771 in words is "one hundred thirty-six million, five hundred thirty-one thousand, seven hundred seventy-one".