216650145 has 8 divisors (see below), whose sum is σ = 346640256. Its totient is φ = 115546736.

The previous prime is 216650143. The next prime is 216650171. The reversal of 216650145 is 541056612.

216650145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 216650145 - 2¹ = 216650143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216650143) 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, 7221657 + ... + 7221686.

It is an arithmetic number, because the mean of its divisors is an integer number (43330032).

Almost surely, 2^216650145 is an apocalyptic number.

It is an amenable number.

216650145 is a deficient number, since it is larger than the sum of its proper divisors (129990111).

216650145 is a wasteful number, since it uses less digits than its factorization.

216650145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14443351.

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

The square root of 216650145 is about 14719.0402200687. The cubic root of 216650145 is about 600.6013831403.

The spelling of 216650145 in words is "two hundred sixteen million, six hundred fifty thousand, one hundred forty-five".