135215055 has 16 divisors (see below), whose sum is σ = 240382560. Its totient is φ = 72114624.

The previous prime is 135215033. The next prime is 135215083. The reversal of 135215055 is 550512531.

135215055 is a `hidden beast` number, since 135 + 21 + 505 + 5 = 666.

It is not a de Polignac number, because 135215055 - 2⁹ = 135214543 is a prime.

It is a super-2 number, since 2×135215055² = 36566222197306050, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 500662 + ... + 500931.

It is an arithmetic number, because the mean of its divisors is an integer number (15023910).

Almost surely, 2^135215055 is an apocalyptic number.

135215055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

135215055 is a deficient number, since it is larger than the sum of its proper divisors (105167505).

135215055 is a wasteful number, since it uses less digits than its factorization.

135215055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001607 (or 1001601 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 135215055 is about 11628.2008496586. The cubic root of 135215055 is about 513.2650386552.

Adding to 135215055 its reverse (550512531), we get a palindrome (685727586).

The spelling of 135215055 in words is "one hundred thirty-five million, two hundred fifteen thousand, fifty-five".