212135676 has 12 divisors (see below), whose sum is σ = 494983272. Its totient is φ = 70711888.

The previous prime is 212135629. The next prime is 212135687. The reversal of 212135676 is 676531212.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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, 8838975 + ... + 8838998.

It is an arithmetic number, because the mean of its divisors is an integer number (41248606).

Almost surely, 2^212135676 is an apocalyptic number.

It is an amenable number.

212135676 is an abundant number, since it is smaller than the sum of its proper divisors (282847596).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212135676 is a wasteful number, since it uses less digits than its factorization.

212135676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17677980 (or 17677978 counting only the distinct ones).

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

The square root of 212135676 is about 14564.8781663288. The cubic root of 212135676 is about 596.4003698468.

Adding to 212135676 its reverse (676531212), we get a palindrome (888666888).

The spelling of 212135676 in words is "two hundred twelve million, one hundred thirty-five thousand, six hundred seventy-six".