216609036 has 48 divisors (see below), whose sum is σ = 611606016. Its totient is φ = 58247424.

The previous prime is 216609023. The next prime is 216609079. The reversal of 216609036 is 630906612.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 216608988 and 216609006.

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, 74416 + ... + 77271.

It is an arithmetic number, because the mean of its divisors is an integer number (12741792).

Almost surely, 2^216609036 is an apocalyptic number.

It is an amenable number.

216609036 is an abundant number, since it is smaller than the sum of its proper divisors (394996980).

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

216609036 is a wasteful number, since it uses less digits than its factorization.

216609036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151718 (or 151716 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 216609036 is about 14717.6436972771. The cubic root of 216609036 is about 600.5633930371.

The spelling of 216609036 in words is "two hundred sixteen million, six hundred nine thousand, thirty-six".