213653636 has 12 divisors (see below), whose sum is σ = 427307328. Its totient is φ = 91565832.

The previous prime is 213653623. The next prime is 213653663. The reversal of 213653636 is 636356312.

213653636 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 213653596 and 213653605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3815216 + ... + 3815271.

It is an arithmetic number, because the mean of its divisors is an integer number (35608944).

Almost surely, 2^213653636 is an apocalyptic number.

It is an amenable number.

213653636 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.

213653636 is a wasteful number, since it uses less digits than its factorization.

213653636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7630498 (or 7630496 counting only the distinct ones).

The product of its digits is 58320, while the sum is 35.

The square root of 213653636 is about 14616.8955664327. The cubic root of 213653636 is about 597.8195262300.

The spelling of 213653636 in words is "two hundred thirteen million, six hundred fifty-three thousand, six hundred thirty-six".