135218237 has 16 divisors (see below), whose sum is σ = 169264512. Its totient is φ = 104939520.

The previous prime is 135218207. The next prime is 135218257. The reversal of 135218237 is 732812531.

It is not a de Polignac number, because 135218237 - 2¹⁰ = 135217213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135218207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16373 + ... + 23205.

It is an arithmetic number, because the mean of its divisors is an integer number (10579032).

Almost surely, 2^135218237 is an apocalyptic number.

It is an amenable number.

135218237 is a deficient number, since it is larger than the sum of its proper divisors (34046275).

135218237 is a wasteful number, since it uses less digits than its factorization.

135218237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7108.

The product of its digits is 10080, while the sum is 32.

The square root of 135218237 is about 11628.3376713957. The cubic root of 135218237 is about 513.2690648256.

The spelling of 135218237 in words is "one hundred thirty-five million, two hundred eighteen thousand, two hundred thirty-seven".