212135263 has 4 divisors (see below), whose sum is σ = 218978368. Its totient is φ = 205292160.

The previous prime is 212135221. The next prime is 212135269. The reversal of 212135263 is 362531212.

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 212135263 - 2⁹ = 212134751 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 (212135269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3421506 + ... + 3421567.

It is an arithmetic number, because the mean of its divisors is an integer number (54744592).

Almost surely, 2^212135263 is an apocalyptic number.

212135263 is a deficient number, since it is larger than the sum of its proper divisors (6843105).

212135263 is an equidigital number, since it uses as much as digits as its factorization.

212135263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6843104.

The product of its digits is 2160, while the sum is 25.

The square root of 212135263 is about 14564.8639883797. The cubic root of 212135263 is about 596.3999828091.

Adding to 212135263 its reverse (362531212), we get a palindrome (574666475).

The spelling of 212135263 in words is "two hundred twelve million, one hundred thirty-five thousand, two hundred sixty-three".