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12200230 = 257174289
BaseRepresentation
bin101110100010…
…100100100110
3211221211120101
4232202210212
511110401410
61113254314
7205462120
oct56424446
924854511
1012200230
116983239
12410439a
1326b2193
141898210
15110ed3a
hexba2926

12200230 has 16 divisors (see below), whose sum is σ = 25097760. Its totient is φ = 4182912.

The previous prime is 12200179. The next prime is 12200239. The reversal of 12200230 is 3200221.

It is a super-2 number, since 2×122002302 = 297691224105800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12200239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87075 + ... + 87214.

It is an arithmetic number, because the mean of its divisors is an integer number (1568610).

Almost surely, 212200230 is an apocalyptic number.

12200230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12200230 is an abundant number, since it is smaller than the sum of its proper divisors (12897530).

12200230 is a wasteful number, since it uses less digits than its factorization.

12200230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174303.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 12200230 is about 3492.8827635636. The cubic root of 12200230 is about 230.2091984480.

Adding to 12200230 its reverse (3200221), we get a palindrome (15400451).

Subtracting from 12200230 its reverse (3200221), we obtain a palindrome (9000009).

The spelling of 12200230 in words is "twelve million, two hundred thousand, two hundred thirty".

Divisors: 1 2 5 7 10 14 35 70 174289 348578 871445 1220023 1742890 2440046 6100115 12200230