212016636 has 48 divisors (see below), whose sum is σ = 591959200. Its totient is φ = 65235456.

The previous prime is 212016619. The next prime is 212016643. The reversal of 212016636 is 636610212.

212016636 is a `hidden beast` number, since 2 + 1 + 20 + 1 + 6 + 636 = 666.

212016636 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74101 + ... + 76908.

Almost surely, 2^212016636 is an apocalyptic number.

212016636 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

212016636 is an abundant number, since it is smaller than the sum of its proper divisors (379942564).

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

212016636 is a wasteful number, since it uses less digits than its factorization.

212016636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151035 (or 151027 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 212016636 is about 14560.7910499396. The cubic root of 212016636 is about 596.2887922232.

Adding to 212016636 its reverse (636610212), we get a palindrome (848626848).

The spelling of 212016636 in words is "two hundred twelve million, sixteen thousand, six hundred thirty-six".