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12224231 = 97126023
BaseRepresentation
bin101110101000…
…011011100111
3212000001111022
4232220123213
511112133411
61114001355
7205622105
oct56503347
925001438
1012224231
11699a278
12411625b
1326c0096
1418a2c75
151116edb
hexba86e7

12224231 has 4 divisors (see below), whose sum is σ = 12350352. Its totient is φ = 12098112.

The previous prime is 12224221. The next prime is 12224257. The reversal of 12224231 is 13242221.

Adding to 12224231 its reverse (13242221), we get a palindrome (25466452).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12224231 is a prime.

It is a super-2 number, since 2×122242312 = 298863647082722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12224221) 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, 62915 + ... + 63108.

It is an arithmetic number, because the mean of its divisors is an integer number (3087588).

Almost surely, 212224231 is an apocalyptic number.

12224231 is a deficient number, since it is larger than the sum of its proper divisors (126121).

12224231 is an equidigital number, since it uses as much as digits as its factorization.

12224231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126120.

The product of its digits is 192, while the sum is 17.

The square root of 12224231 is about 3496.3167762661. The cubic root of 12224231 is about 230.3600598587.

The spelling of 12224231 in words is "twelve million, two hundred twenty-four thousand, two hundred thirty-one".

Divisors: 1 97 126023 12224231