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130123210 = 25719227431
BaseRepresentation
bin1111100000110…
…00010111001010
3100001211221111011
413300120113022
5231302420320
620524554134
73140012650
oct760302712
9301757434
10130123210
11674a6548
12376b294a
1320c5c8a9
14133d2dd0
15b65505a
hex7c185ca

130123210 has 64 divisors (see below), whose sum is σ = 283668480. Its totient is φ = 41981760.

The previous prime is 130123199. The next prime is 130123211. The reversal of 130123210 is 12321031.

It is not an unprimeable number, because it can be changed into a prime (130123211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 301695 + ... + 302125.

It is an arithmetic number, because the mean of its divisors is an integer number (4432320).

Almost surely, 2130123210 is an apocalyptic number.

130123210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

130123210 is an abundant number, since it is smaller than the sum of its proper divisors (153545270).

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

130123210 is a wasteful number, since it uses less digits than its factorization.

130123210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 130123210 is about 11407.1560872989. The cubic root of 130123210 is about 506.7396915944.

Adding to 130123210 its reverse (12321031), we get a palindrome (142444241).

The spelling of 130123210 in words is "one hundred thirty million, one hundred twenty-three thousand, two hundred ten".

Divisors: 1 2 5 7 10 14 19 35 38 70 95 133 190 227 266 431 454 665 862 1135 1330 1589 2155 2270 3017 3178 4310 4313 6034 7945 8189 8626 15085 15890 16378 21565 30170 30191 40945 43130 57323 60382 81890 97837 114646 150955 195674 286615 301910 489185 573230 684859 978370 1369718 1858903 3424295 3717806 6848590 9294515 13012321 18589030 26024642 65061605 130123210