216715044 has 72 divisors (see below), whose sum is σ = 633497088. Its totient is φ = 57153600.

The previous prime is 216715043. The next prime is 216715069. The reversal of 216715044 is 440517612.

It is not an unprimeable number, because it can be changed into a prime (216715043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6532 + ... + 21819.

Almost surely, 2^216715044 is an apocalyptic number.

It is an amenable number.

216715044 is an abundant number, since it is smaller than the sum of its proper divisors (416782044).

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

216715044 is a wasteful number, since it uses less digits than its factorization.

216715044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28385 (or 28376 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 216715044 is about 14721.2446484664. The cubic root of 216715044 is about 600.6613485401.

The spelling of 216715044 in words is "two hundred sixteen million, seven hundred fifteen thousand, forty-four".