135157191 has 16 divisors (see below), whose sum is σ = 205488864. Its totient is φ = 78280704.

The previous prime is 135157163. The next prime is 135157193. The reversal of 135157191 is 191751531.

It is a happy number.

It is not a de Polignac number, because 135157191 - 2⁵ = 135157159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135157193) 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 in 15 ways as a sum of consecutive naturals, for example, 101266 + ... + 102591.

It is an arithmetic number, because the mean of its divisors is an integer number (12843054).

Almost surely, 2^135157191 is an apocalyptic number.

135157191 is a deficient number, since it is larger than the sum of its proper divisors (70331673).

135157191 is a wasteful number, since it uses less digits than its factorization.

135157191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203890.

The product of its digits is 4725, while the sum is 33.

The square root of 135157191 is about 11625.7124942947. The cubic root of 135157191 is about 513.1918125741.

It can be divided in two parts, 13515 and 7191, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 135157191 in words is "one hundred thirty-five million, one hundred fifty-seven thousand, one hundred ninety-one".