2216655 has 48 divisors (see below), whose sum is σ = 4552704. Its totient is φ = 976320.

The previous prime is 2216653. The next prime is 2216657. The reversal of 2216655 is 5566122.

2216655 is a `hidden beast` number, since 2 + 2 + 1 + 6 + 655 = 666.

It is an interprime number because it is at equal distance from previous prime (2216653) and next prime (2216657).

It is not a de Polignac number, because 2216655 - 2¹ = 2216653 is a prime.

2216655 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216653) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9652 + ... + 9878.

It is an arithmetic number, because the mean of its divisors is an integer number (94848).

2^2216655 is an apocalyptic number.

2216655 is an abundant number, since it is smaller than the sum of its proper divisors (2336049).

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

2216655 is a wasteful number, since it uses less digits than its factorization.

2216655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 273 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 2216655 is about 1488.8435109171. The cubic root of 2216655 is about 130.3865222185.

The spelling of 2216655 in words is "two million, two hundred sixteen thousand, six hundred fifty-five".