212134685 has 8 divisors (see below), whose sum is σ = 290927616. Its totient is φ = 145463760.

The previous prime is 212134679. The next prime is 212134693. The reversal of 212134685 is 586431212.

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

It is not a de Polignac number, because 212134685 - 2²⁶ = 145025821 is a prime.

It is a super-2 number, since 2×212134685² = 90002249160098450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3030461 + ... + 3030530.

It is an arithmetic number, because the mean of its divisors is an integer number (36365952).

Almost surely, 2^212134685 is an apocalyptic number.

It is an amenable number.

212134685 is a deficient number, since it is larger than the sum of its proper divisors (78792931).

212134685 is an equidigital number, since it uses as much as digits as its factorization.

212134685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6061003.

The product of its digits is 11520, while the sum is 32.

The square root of 212134685 is about 14564.8441460937. The cubic root of 212134685 is about 596.3994411429.

Adding to 212134685 its reverse (586431212), we get a palindrome (798565897).

The spelling of 212134685 in words is "two hundred twelve million, one hundred thirty-four thousand, six hundred eighty-five".