135143211 has 16 divisors (see below), whose sum is σ = 206198784. Its totient is φ = 77124864.

The previous prime is 135143191. The next prime is 135143227. The reversal of 135143211 is 112341531.

It is not a de Polignac number, because 135143211 - 2¹¹ = 135141163 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (135143231) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 14395 + ... + 21851.

It is an arithmetic number, because the mean of its divisors is an integer number (12887424).

Almost surely, 2^135143211 is an apocalyptic number.

135143211 is a deficient number, since it is larger than the sum of its proper divisors (71055573).

135143211 is an equidigital number, since it uses as much as digits as its factorization.

135143211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8330.

The product of its digits is 360, while the sum is 21.

The square root of 135143211 is about 11625.1112252744. Note that the first 3 decimals coincide. The cubic root of 135143211 is about 513.1741179455.

Adding to 135143211 its reverse (112341531), we get a palindrome (247484742).

The spelling of 135143211 in words is "one hundred thirty-five million, one hundred forty-three thousand, two hundred eleven".