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12223532220 = 2235293695309
BaseRepresentation
bin10110110001001010…
…00100110010111100
31011112212201202220120
423120211010302330
5200013211012340
65340532414540
7611624211114
oct133045046274
934485652816
1012223532220
115202957749
122451777450
1311ca56ac03
1483d5a8044
154b81c74d0
hex2d8944cbc

12223532220 has 48 divisors (see below), whose sum is σ = 34342751520. Its totient is φ = 3248478976.

The previous prime is 12223532207. The next prime is 12223532227. The reversal of 12223532220 is 2223532221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12223532227) 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, 330075 + ... + 365234.

It is an arithmetic number, because the mean of its divisors is an integer number (715473990).

Almost surely, 212223532220 is an apocalyptic number.

12223532220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12223532220 is an abundant number, since it is smaller than the sum of its proper divisors (22119219300).

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

12223532220 is a wasteful number, since it uses less digits than its factorization.

12223532220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695614 (or 695612 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

Subtracting from 12223532220 its reverse (2223532221), we obtain a palindrome (9999999999).

The spelling of 12223532220 in words is "twelve billion, two hundred twenty-three million, five hundred thirty-two thousand, two hundred twenty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 293 586 879 1172 1465 1758 2930 3516 4395 5860 8790 17580 695309 1390618 2085927 2781236 3476545 4171854 6953090 8343708 10429635 13906180 20859270 41718540 203725537 407451074 611176611 814902148 1018627685 1222353222 2037255370 2444706444 3055883055 4074510740 6111766110 12223532220