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13002231 = 311394007
BaseRepresentation
bin110001100110…
…010111110111
3220110120201010
4301212113313
511312032411
61142403303
7215342244
oct61462767
926416633
1013002231
117380850
124430533
132903238
141a265cb
15121c7a6
hexc665f7

13002231 has 8 divisors (see below), whose sum is σ = 18912384. Its totient is φ = 7880120.

The previous prime is 13002203. The next prime is 13002233. The reversal of 13002231 is 13220031.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13002231 - 26 = 13002167 is a prime.

It is a super-3 number, since 3×130022313 (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13002233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196971 + ... + 197036.

It is an arithmetic number, because the mean of its divisors is an integer number (2364048).

Almost surely, 213002231 is an apocalyptic number.

13002231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13002231 is a deficient number, since it is larger than the sum of its proper divisors (5910153).

13002231 is a wasteful number, since it uses less digits than its factorization.

13002231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394021.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 13002231 is about 3605.8606462258. The cubic root of 13002231 is about 235.1469188429.

Adding to 13002231 its reverse (13220031), we get a palindrome (26222262).

The spelling of 13002231 in words is "thirteen million, two thousand, two hundred thirty-one".

Divisors: 1 3 11 33 394007 1182021 4334077 13002231