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12220231310 = 257315631443
BaseRepresentation
bin10110110000110000…
…11110111010001110
31011112122112001220122
423120120132322032
5200011334400220
65340333544542
7611554152350
oct133030367216
934478461818
1012220231310
115201002721
122450645152
1311c9983601
1483cd890d0
154b7c74425
hex2d861ee8e

12220231310 has 32 divisors (see below), whose sum is σ = 25949693952. Its totient is φ = 4054638240.

The previous prime is 12220231271. The next prime is 12220231313. The reversal of 12220231310 is 1313202221.

It is a super-2 number, since 2×122202313102 (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220231313) 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, 2813552 + ... + 2817891.

It is an arithmetic number, because the mean of its divisors is an integer number (810927936).

Almost surely, 212220231310 is an apocalyptic number.

12220231310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12220231310 is an abundant number, since it is smaller than the sum of its proper divisors (13729462642).

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

12220231310 is a wasteful number, since it uses less digits than its factorization.

12220231310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5631488.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12220231310 its reverse (1313202221), we get a palindrome (13533433531).

The spelling of 12220231310 in words is "twelve billion, two hundred twenty million, two hundred thirty-one thousand, three hundred ten".

Divisors: 1 2 5 7 10 14 31 35 62 70 155 217 310 434 1085 2170 5631443 11262886 28157215 39420101 56314430 78840202 174574733 197100505 349149466 394201010 872873665 1222023131 1745747330 2444046262 6110115655 12220231310