135601511 has 4 divisors (see below), whose sum is σ = 135708000. Its totient is φ = 135495024.

The previous prime is 135601483. The next prime is 135601519. The reversal of 135601511 is 115106531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 115106531 = 10399 ⋅11069.

It is a cyclic number.

It is not a de Polignac number, because 135601511 - 2⁶ = 135601447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135601519) 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 3 ways as a sum of consecutive naturals, for example, 51311 + ... + 53888.

It is an arithmetic number, because the mean of its divisors is an integer number (33927000).

Almost surely, 2^135601511 is an apocalyptic number.

135601511 is a deficient number, since it is larger than the sum of its proper divisors (106489).

135601511 is a wasteful number, since it uses less digits than its factorization.

135601511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106488.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 135601511 is about 11644.8061812982. The cubic root of 135601511 is about 513.7535584238.

The spelling of 135601511 in words is "one hundred thirty-five million, six hundred one thousand, five hundred eleven".