135551915 has 8 divisors (see below), whose sum is σ = 163380240. Its totient is φ = 107962912.

The previous prime is 135551893. The next prime is 135551917. The reversal of 135551915 is 519155531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135551915 - 2²⁰ = 134503339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135551917) 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 7 ways as a sum of consecutive naturals, for example, 58580 + ... + 60849.

It is an arithmetic number, because the mean of its divisors is an integer number (20422530).

Almost surely, 2^135551915 is an apocalyptic number.

135551915 is a deficient number, since it is larger than the sum of its proper divisors (27828325).

135551915 is a wasteful number, since it uses less digits than its factorization.

135551915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119661.

The product of its digits is 16875, while the sum is 35.

The square root of 135551915 is about 11642.6764534621. The cubic root of 135551915 is about 513.6909159838.

The spelling of 135551915 in words is "one hundred thirty-five million, five hundred fifty-one thousand, nine hundred fifteen".