211030135 has 4 divisors (see below), whose sum is σ = 253236168. Its totient is φ = 168824104.

The previous prime is 211030133. The next prime is 211030159. The reversal of 211030135 is 531030112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211030135 - 2¹ = 211030133 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 (211030133) 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, 21103009 + ... + 21103018.

It is an arithmetic number, because the mean of its divisors is an integer number (63309042).

Almost surely, 2^211030135 is an apocalyptic number.

211030135 is a deficient number, since it is larger than the sum of its proper divisors (42206033).

211030135 is an equidigital number, since it uses as much as digits as its factorization.

211030135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42206032.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 211030135 is about 14526.8762987781. The cubic root of 211030135 is about 595.3625218219.

Adding to 211030135 its reverse (531030112), we get a palindrome (742060247).

The spelling of 211030135 in words is "two hundred eleven million, thirty thousand, one hundred thirty-five".