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13238115 = 351180231
BaseRepresentation
bin110010011111…
…111101100011
3220220120021120
4302133331203
511342104430
61151423323
7220344042
oct62377543
926816246
1013238115
117521aa0
124524b43
132986707
141a88559
151267610
hexc9ff63

13238115 has 16 divisors (see below), whose sum is σ = 23106816. Its totient is φ = 6418400.

The previous prime is 13238101. The next prime is 13238129. The reversal of 13238115 is 51183231.

13238115 is nontrivially palindromic in base 4.

It is an interprime number because it is at equal distance from previous prime (13238101) and next prime (13238129).

It is not a de Polignac number, because 13238115 - 26 = 13238051 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39951 + ... + 40280.

It is an arithmetic number, because the mean of its divisors is an integer number (1444176).

Almost surely, 213238115 is an apocalyptic number.

13238115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13238115 is a deficient number, since it is larger than the sum of its proper divisors (9868701).

13238115 is a wasteful number, since it uses less digits than its factorization.

13238115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80250.

The product of its digits is 720, while the sum is 24.

The square root of 13238115 is about 3638.4220480862. The cubic root of 13238115 is about 236.5604021605.

Subtracting 13238115 from its reverse (51183231), we obtain a triangular number (37945116 = T8711).

The spelling of 13238115 in words is "thirteen million, two hundred thirty-eight thousand, one hundred fifteen".

Divisors: 1 3 5 11 15 33 55 165 80231 240693 401155 882541 1203465 2647623 4412705 13238115