212645636 has 12 divisors (see below), whose sum is σ = 425291328. Its totient is φ = 91133832.

The previous prime is 212645633. The next prime is 212645651. The reversal of 212645636 is 636546212.

It is a happy number.

212645636 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 212645596 and 212645605.

It is not an unprimeable number, because it can be changed into a prime (212645633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3797216 + ... + 3797271.

It is an arithmetic number, because the mean of its divisors is an integer number (35440944).

Almost surely, 2^212645636 is an apocalyptic number.

It is an amenable number.

212645636 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

212645636 is a wasteful number, since it uses less digits than its factorization.

212645636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7594498 (or 7594496 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

The square root of 212645636 is about 14582.3741551230. The cubic root of 212645636 is about 596.8778896308.

The spelling of 212645636 in words is "two hundred twelve million, six hundred forty-five thousand, six hundred thirty-six".