Search a number
BaseRepresentation
bin101110101000…
…011011010111
3212000001110201
4232220123113
511112133330
61114001331
7205622053
oct56503327
925001421
1012224215
11699a263
124116247
1326c0083
1418a2c63
151116eca
hexba86d7

12224215 has 16 divisors (see below), whose sum is σ = 15056928. Its totient is φ = 9524736.

The previous prime is 12224213. The next prime is 12224221. The reversal of 12224215 is 51242221.

Adding to 12224215 its reverse (51242221), we get a palindrome (63466436).

It is a cyclic number.

It is not a de Polignac number, because 12224215 - 21 = 12224213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12224192 and 12224201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12224213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38899 + ... + 39211.

It is an arithmetic number, because the mean of its divisors is an integer number (941058).

Almost surely, 212224215 is an apocalyptic number.

12224215 is a deficient number, since it is larger than the sum of its proper divisors (2832713).

12224215 is a wasteful number, since it uses less digits than its factorization.

12224215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498.

The product of its digits is 320, while the sum is 19.

The square root of 12224215 is about 3496.3144881432. The cubic root of 12224215 is about 230.3599593545.

The spelling of 12224215 in words is "twelve million, two hundred twenty-four thousand, two hundred fifteen".