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13271830 = 2511139281
BaseRepresentation
bin110010101000…
…001100010110
3220222021112021
4302220030112
511344144310
61152243354
7220544245
oct62501426
926867467
1013271830
117545360
12454055a
132998b70
141a9695c
1512725da
hexca8316

13271830 has 32 divisors (see below), whose sum is σ = 28068768. Its totient is φ = 4454400.

The previous prime is 13271809. The next prime is 13271833. The reversal of 13271830 is 3817231.

It is a super-2 number, since 2×132718302 = 352282943097800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13271795 and 13271804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13271833) 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, 3211 + ... + 6070.

It is an arithmetic number, because the mean of its divisors is an integer number (877149).

Almost surely, 213271830 is an apocalyptic number.

13271830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13271830 is an abundant number, since it is smaller than the sum of its proper divisors (14796938).

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

13271830 is a wasteful number, since it uses less digits than its factorization.

13271830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9312.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 13271830 is about 3643.0522916917. The cubic root of 13271830 is about 236.7610569291.

The spelling of 13271830 in words is "thirteen million, two hundred seventy-one thousand, eight hundred thirty".

Divisors: 1 2 5 10 11 13 22 26 55 65 110 130 143 286 715 1430 9281 18562 46405 92810 102091 120653 204182 241306 510455 603265 1020910 1206530 1327183 2654366 6635915 13271830