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211232230 = 251123292879
BaseRepresentation
bin11001001011100…
…10010111100110
3112201110201010221
430211302113212
5413033412410
632543234554
75143305256
oct1445622746
9481421127
10211232230
11a92649a0
125a8a8a5a
13349ba9b1
14200a7966
15138274da
hexc9725e6

211232230 has 64 divisors (see below), whose sum is σ = 447897600. Its totient is φ = 70913920.

The previous prime is 211232209. The next prime is 211232243. The reversal of 211232230 is 32232112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71931 + ... + 74809.

It is an arithmetic number, because the mean of its divisors is an integer number (6998400).

Almost surely, 2211232230 is an apocalyptic number.

211232230 is an abundant number, since it is smaller than the sum of its proper divisors (236665370).

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

211232230 is a wasteful number, since it uses less digits than its factorization.

211232230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2949.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 211232230 is about 14533.8305343086. The cubic root of 211232230 is about 595.5525126981.

Adding to 211232230 its reverse (32232112), we get a palindrome (243464342).

The spelling of 211232230 in words is "two hundred eleven million, two hundred thirty-two thousand, two hundred thirty".

Divisors: 1 2 5 10 11 22 23 29 46 55 58 110 115 145 230 253 290 319 506 638 667 1265 1334 1595 2530 2879 3190 3335 5758 6670 7337 14395 14674 28790 31669 36685 63338 66217 73370 83491 132434 158345 166982 316690 331085 417455 662170 728387 834910 918401 1456774 1836802 1920293 3641935 3840586 4592005 7283870 9184010 9601465 19202930 21123223 42246446 105616115 211232230