135515651 has 4 divisors (see below), whose sum is σ = 135782400. Its totient is φ = 135248904.

The previous prime is 135515623. The next prime is 135515659. The reversal of 135515651 is 156515531.

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 135515651 - 2¹⁰ = 135514627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135515659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132611 + ... + 133628.

It is an arithmetic number, because the mean of its divisors is an integer number (33945600).

Almost surely, 2^135515651 is an apocalyptic number.

135515651 is a deficient number, since it is larger than the sum of its proper divisors (266749).

135515651 is an equidigital number, since it uses as much as digits as its factorization.

135515651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266748.

The product of its digits is 11250, while the sum is 32.

The square root of 135515651 is about 11641.1189754250. The cubic root of 135515651 is about 513.6451029120.

The spelling of 135515651 in words is "one hundred thirty-five million, five hundred fifteen thousand, six hundred fifty-one".