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220123230 = 23579131709
BaseRepresentation
bin11010001111011…
…01000001011110
3120100012102022020
431013231001132
5422322420410
633502001010
75312005455
oct1507550136
9510172266
10220123230
11103287928
1261876166
13367b1842
142133db9c
15144d1a70
hexd1ed05e

220123230 has 64 divisors (see below), whose sum is σ = 539827200. Its totient is φ = 57432960.

The previous prime is 220123229. The next prime is 220123247. The reversal of 220123230 is 32321022.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 310116 + ... + 310824.

It is an arithmetic number, because the mean of its divisors is an integer number (8434800).

Almost surely, 2220123230 is an apocalyptic number.

220123230 is an abundant number, since it is smaller than the sum of its proper divisors (319703970).

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

220123230 is a wasteful number, since it uses less digits than its factorization.

220123230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 220123230 is about 14836.5504750936. The cubic root of 220123230 is about 603.7937672149.

Adding to 220123230 its reverse (32321022), we get a palindrome (252444252).

The spelling of 220123230 in words is "two hundred twenty million, one hundred twenty-three thousand, two hundred thirty".

Divisors: 1 2 3 5 6 10 15 30 79 131 158 237 262 393 395 474 655 709 786 790 1185 1310 1418 1965 2127 2370 3545 3930 4254 7090 10349 10635 20698 21270 31047 51745 56011 62094 92879 103490 112022 155235 168033 185758 278637 280055 310470 336066 464395 557274 560110 840165 928790 1393185 1680330 2786370 7337441 14674882 22012323 36687205 44024646 73374410 110061615 220123230