135213215 has 8 divisors (see below), whose sum is σ = 170795760. Its totient is φ = 102477312.

The previous prime is 135213209. The next prime is 135213233. The reversal of 135213215 is 512312531.

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 135213215 - 2¹⁰ = 135212191 is a prime.

It is a super-2 number, since 2×135213215² = 36565227021272450, which contains 22 as substring.

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, 711554 + ... + 711743.

It is an arithmetic number, because the mean of its divisors is an integer number (21349470).

Almost surely, 2^135213215 is an apocalyptic number.

135213215 is a deficient number, since it is larger than the sum of its proper divisors (35582545).

135213215 is a wasteful number, since it uses less digits than its factorization.

135213215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423321.

The product of its digits is 900, while the sum is 23.

The square root of 135213215 is about 11628.1217313890. The cubic root of 135213215 is about 513.2627104826.

Adding to 135213215 its reverse (512312531), we get a palindrome (647525746).

The spelling of 135213215 in words is "one hundred thirty-five million, two hundred thirteen thousand, two hundred fifteen".