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13275281 = 195313183
BaseRepresentation
bin110010101001…
…000010010001
3220222110021002
4302221002101
511344302111
61152311345
7220560305
oct62510221
926873232
1013275281
117547a08
124542555
13299a5c6
141a97d05
15127363b
hexca9091

13275281 has 8 divisors (see below), whose sum is σ = 14238720. Its totient is φ = 12338352.

The previous prime is 13275277. The next prime is 13275287. The reversal of 13275281 is 18257231.

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 13275281 - 22 = 13275277 is a prime.

It is a super-2 number, since 2×132752812 = 352466171257922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13275287) 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, 5585 + ... + 7598.

It is an arithmetic number, because the mean of its divisors is an integer number (1779840).

Almost surely, 213275281 is an apocalyptic number.

It is an amenable number.

13275281 is a deficient number, since it is larger than the sum of its proper divisors (963439).

13275281 is a wasteful number, since it uses less digits than its factorization.

13275281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13255.

The product of its digits is 3360, while the sum is 29.

The square root of 13275281 is about 3643.5259021997. The cubic root of 13275281 is about 236.7815763702.

The spelling of 13275281 in words is "thirteen million, two hundred seventy-five thousand, two hundred eighty-one".

Divisors: 1 19 53 1007 13183 250477 698699 13275281