135005213 has 4 divisors (see below), whose sum is σ = 154291680. Its totient is φ = 115718748.

The previous prime is 135005183. The next prime is 135005219. The reversal of 135005213 is 312500531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135005213 - 2⁶ = 135005149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135005219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9643223 + ... + 9643236.

It is an arithmetic number, because the mean of its divisors is an integer number (38572920).

Almost surely, 2^135005213 is an apocalyptic number.

It is an amenable number.

135005213 is a deficient number, since it is larger than the sum of its proper divisors (19286467).

135005213 is an equidigital number, since it uses as much as digits as its factorization.

135005213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19286466.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 135005213 is about 11619.1743682587. The cubic root of 135005213 is about 512.9993869585. Note that the first 3 decimals are identical.

Adding to 135005213 its reverse (312500531), we get a palindrome (447505744).

The spelling of 135005213 in words is "one hundred thirty-five million, five thousand, two hundred thirteen".