216615045 has 8 divisors (see below), whose sum is σ = 346584096. Its totient is φ = 115528016.

The previous prime is 216615041. The next prime is 216615059. The reversal of 216615045 is 540516612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216615045 - 2² = 216615041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216615041) 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, 7220487 + ... + 7220516.

It is an arithmetic number, because the mean of its divisors is an integer number (43323012).

Almost surely, 2^216615045 is an apocalyptic number.

It is an amenable number.

216615045 is a deficient number, since it is larger than the sum of its proper divisors (129969051).

216615045 is a wasteful number, since it uses less digits than its factorization.

216615045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14441011.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 216615045 is about 14717.8478385938. The cubic root of 216615045 is about 600.5689464405.

The spelling of 216615045 in words is "two hundred sixteen million, six hundred fifteen thousand, forty-five".