216056604 has 48 divisors (see below), whose sum is σ = 535949568. Its totient is φ = 67507968.

The previous prime is 216056573. The next prime is 216056627. The reversal of 216056604 is 406650612.

It is a super-2 number, since 2×216056604² = 93360912264025632, which contains 22 as substring.

It is a zygodrome in base 2.

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, 51639 + ... + 55665.

It is an arithmetic number, because the mean of its divisors is an integer number (11165616).

Almost surely, 2^216056604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216056604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267974784).

216056604 is an abundant number, since it is smaller than the sum of its proper divisors (319892964).

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

216056604 is a wasteful number, since it uses less digits than its factorization.

216056604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4314 (or 4312 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 216056604 is about 14698.8640377411. The cubic root of 216056604 is about 600.0524065336.

The spelling of 216056604 in words is "two hundred sixteen million, fifty-six thousand, six hundred four".