136552191 has 4 divisors (see below), whose sum is σ = 182069592. Its totient is φ = 91034792.

The previous prime is 136552151. The next prime is 136552217. The reversal of 136552191 is 191255631.

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

It is a cyclic number.

It is not a de Polignac number, because 136552191 - 2¹⁸ = 136290047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136552151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22758696 + ... + 22758701.

It is an arithmetic number, because the mean of its divisors is an integer number (45517398).

Almost surely, 2^136552191 is an apocalyptic number.

136552191 is a deficient number, since it is larger than the sum of its proper divisors (45517401).

136552191 is an equidigital number, since it uses as much as digits as its factorization.

136552191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45517400.

The product of its digits is 8100, while the sum is 33.

The square root of 136552191 is about 11685.5548006930. The cubic root of 136552191 is about 514.9513775694.

The spelling of 136552191 in words is "one hundred thirty-six million, five hundred fifty-two thousand, one hundred ninety-one".