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2215 = 5443
BaseRepresentation
bin100010100111
310001001
4202213
532330
614131
76313
oct4247
93031
102215
111734
121347
131015
14b43
159ca
hex8a7

2215 has 4 divisors (see below), whose sum is σ = 2664. Its totient is φ = 1768.

The previous prime is 2213. The next prime is 2221. The reversal of 2215 is 5122.

Adding to 2215 its reverse (5122), we get a palindrome (7337).

2215 = 192 + 202 + ... + 232.

2215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2215 - 21 = 2213 is a prime.

It is a Duffinian number.

2215 is a lucky number.

It is a plaindrome in base 12.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217 + ... + 226.

It is an arithmetic number, because the mean of its divisors is an integer number (666).

2215 is a deficient number, since it is larger than the sum of its proper divisors (449).

2215 is an equidigital number, since it uses as much as digits as its factorization.

2215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448.

The product of its digits is 20, while the sum is 10.

The square root of 2215 is about 47.0637865030. The cubic root of 2215 is about 13.0354064390.

The spelling of 2215 in words is "two thousand, two hundred fifteen".

Divisors: 1 5 443 2215