216799452 has 36 divisors (see below), whose sum is σ = 548700880. Its totient is φ = 72176832.

The previous prime is 216799417. The next prime is 216799459. The reversal of 216799452 is 254997612.

216799452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 216799398 and 216799407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216799459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29808 + ... + 36360.

Almost surely, 2^216799452 is an apocalyptic number.

It is an amenable number.

216799452 is an abundant number, since it is smaller than the sum of its proper divisors (331901428).

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

216799452 is a wasteful number, since it uses less digits than its factorization.

216799452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7482 (or 7477 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 216799452 is about 14724.1112465235. Note that the first 3 decimals coincide. The cubic root of 216799452 is about 600.7393219642.

The spelling of 216799452 in words is "two hundred sixteen million, seven hundred ninety-nine thousand, four hundred fifty-two".