216650057 has 24 divisors (see below), whose sum is σ = 252043704. Its totient is φ = 185462784.

The previous prime is 216650051. The next prime is 216650081. The reversal of 216650057 is 750056612.

It is a happy number.

216650057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 19219456 + 197430601 = 4384^2 + 14051^2 .

It is not a de Polignac number, because 216650057 - 2²⁰ = 215601481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216650051) 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, 209213 + ... + 210245.

It is an arithmetic number, because the mean of its divisors is an integer number (10501821).

Almost surely, 2^216650057 is an apocalyptic number.

It is an amenable number.

216650057 is a deficient number, since it is larger than the sum of its proper divisors (35393647).

216650057 is a wasteful number, since it uses less digits than its factorization.

216650057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149 (or 1136 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 216650057 is about 14719.0372307430. The cubic root of 216650057 is about 600.6013018219.

The spelling of 216650057 in words is "two hundred sixteen million, six hundred fifty thousand, fifty-seven".