135520415 has 8 divisors (see below), whose sum is σ = 163565568. Its totient is φ = 107788960.

The previous prime is 135520403. The next prime is 135520423. The reversal of 135520415 is 514025531.

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

It is not a de Polignac number, because 135520415 - 2⁶ = 135520351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 77471 + ... + 79200.

It is an arithmetic number, because the mean of its divisors is an integer number (20445696).

Almost surely, 2^135520415 is an apocalyptic number.

135520415 is a deficient number, since it is larger than the sum of its proper divisors (28045153).

135520415 is a wasteful number, since it uses less digits than its factorization.

135520415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156849.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 135520415 is about 11641.3235931315. The cubic root of 135520415 is about 513.6511218394.

Adding to 135520415 its reverse (514025531), we get a palindrome (649545946).

The spelling of 135520415 in words is "one hundred thirty-five million, five hundred twenty thousand, four hundred fifteen".