135255215205 has 32 divisors (see below), whose sum is σ = 262313147520. Its totient is φ = 65578285440.

The previous prime is 135255215197. The next prime is 135255215233. The reversal of 135255215205 is 502512552531.

135255215205 is a `hidden beast` number, since 1 + 3 + 52 + 552 + 1 + 52 + 0 + 5 = 666.

It is not a de Polignac number, because 135255215205 - 2³ = 135255215197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135255215205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45538992 + ... + 45541961.

It is an arithmetic number, because the mean of its divisors is an integer number (8197285860).

Almost surely, 2^135255215205 is an apocalyptic number.

135255215205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

135255215205 is a deficient number, since it is larger than the sum of its proper divisors (127057932315).

135255215205 is a wasteful number, since it uses less digits than its factorization.

135255215205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91080978 (or 91080972 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

Adding to 135255215205 its reverse (502512552531), we get a palindrome (637767767736).

The spelling of 135255215205 in words is "one hundred thirty-five billion, two hundred fifty-five million, two hundred fifteen thousand, two hundred five".