216206772 has 24 divisors (see below), whose sum is σ = 520756992. Its totient is φ = 69744000.

The previous prime is 216206707. The next prime is 216206773. The reversal of 216206772 is 277602612.

216206772 is digitally balanced in base 2, base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

216206772 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216206773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290229 + ... + 290972.

It is an arithmetic number, because the mean of its divisors is an integer number (21698208).

Almost surely, 2^216206772 is an apocalyptic number.

It is an amenable number.

216206772 is an abundant number, since it is smaller than the sum of its proper divisors (304550220).

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

216206772 is a wasteful number, since it uses less digits than its factorization.

216206772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581239 (or 581237 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 216206772 is about 14703.9713002984. The cubic root of 216206772 is about 600.1913944960.

The spelling of 216206772 in words is "two hundred sixteen million, two hundred six thousand, seven hundred seventy-two".