212135667 has 8 divisors (see below), whose sum is σ = 292601040. Its totient is φ = 136547040.

The previous prime is 212135629. The next prime is 212135687. The reversal of 212135667 is 766531212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212135667 - 2¹¹ = 212133619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212135687) 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 7 ways as a sum of consecutive naturals, for example, 1219084 + ... + 1219257.

It is an arithmetic number, because the mean of its divisors is an integer number (36575130).

Almost surely, 2^212135667 is an apocalyptic number.

212135667 is a deficient number, since it is larger than the sum of its proper divisors (80465373).

212135667 is a wasteful number, since it uses less digits than its factorization.

212135667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2438373.

The product of its digits is 15120, while the sum is 33.

The square root of 212135667 is about 14564.8778573663. The cubic root of 212135667 is about 596.4003614126.

Adding to 212135667 its reverse (766531212), we get a palindrome (978666879).

The spelling of 212135667 in words is "two hundred twelve million, one hundred thirty-five thousand, six hundred sixty-seven".