2216601 has 6 divisors (see below), whose sum is σ = 3201770. Its totient is φ = 1477728.

The previous prime is 2216587. The next prime is 2216603. The reversal of 2216601 is 1066122.

It is a happy number.

2216601 is a `hidden beast` number, since 2 + 2 + 1 + 660 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2178576 + 38025 = 1476^2 + 195^2 .

It is not a de Polignac number, because 2216601 - 2⁵ = 2216569 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2216603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123136 + ... + 123153.

2^2216601 is an apocalyptic number.

It is an amenable number.

2216601 is a deficient number, since it is larger than the sum of its proper divisors (985169).

2216601 is a wasteful number, since it uses less digits than its factorization.

2216601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246295 (or 246292 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2216601 is about 1488.8253759256. The cubic root of 2216601 is about 130.3854634266.

The spelling of 2216601 in words is "two million, two hundred sixteen thousand, six hundred one".