135211215 has 24 divisors (see below), whose sum is σ = 220565520. Its totient is φ = 70729984.

The previous prime is 135211207. The next prime is 135211259. The reversal of 135211215 is 512112531.

It is not a de Polignac number, because 135211215 - 2³ = 135211207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135211191 and 135211200.

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 23 ways as a sum of consecutive naturals, for example, 40531 + ... + 43739.

It is an arithmetic number, because the mean of its divisors is an integer number (9190230).

Almost surely, 2^135211215 is an apocalyptic number.

135211215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

135211215 is a deficient number, since it is larger than the sum of its proper divisors (85354305).

135211215 is an equidigital number, since it uses as much as digits as its factorization.

135211215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3323 (or 3270 counting only the distinct ones).

The product of its digits is 300, while the sum is 21.

The square root of 135211215 is about 11628.0357326592. The cubic root of 135211215 is about 513.2601798363.

Adding to 135211215 its reverse (512112531), we get a palindrome (647323746).

The spelling of 135211215 in words is "one hundred thirty-five million, two hundred eleven thousand, two hundred fifteen".