216309484 has 6 divisors (see below), whose sum is σ = 378541604. Its totient is φ = 108154740.

The previous prime is 216309473. The next prime is 216309487. The reversal of 216309484 is 484903612.

It is not an unprimeable number, because it can be changed into a prime (216309487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27038682 + ... + 27038689.

Almost surely, 2^216309484 is an apocalyptic number.

It is an amenable number.

216309484 is a deficient number, since it is larger than the sum of its proper divisors (162232120).

216309484 is a wasteful number, since it uses less digits than its factorization.

216309484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54077375 (or 54077373 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 216309484 is about 14707.4635474646. The cubic root of 216309484 is about 600.2864225077.

The spelling of 216309484 in words is "two hundred sixteen million, three hundred nine thousand, four hundred eighty-four".