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8015 = 57229
BaseRepresentation
bin1111101001111
3101222212
41331033
5224030
6101035
732240
oct17517
911885
108015
116027
12477b
133857
142cc7
152595
hex1f4f

8015 has 8 divisors (see below), whose sum is σ = 11040. Its totient is φ = 5472.

The previous prime is 8011. The next prime is 8017. The reversal of 8015 is 5108.

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 8015 - 22 = 8011 is a prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8011) 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, 80 + ... + 149.

It is an arithmetic number, because the mean of its divisors is an integer number (1380).

28015 is an apocalyptic number.

8015 is a deficient number, since it is larger than the sum of its proper divisors (3025).

8015 is a wasteful number, since it uses less digits than its factorization.

8015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 8015 is about 89.5265323801. The cubic root of 8015 is about 20.0124921956.

Subtracting from 8015 its sum of digits (14), we obtain a triangular number (8001 = T126).

It can be divided in two parts, 801 and 5, that multiplied together give a triangular number (4005 = T89).

The spelling of 8015 in words is "eight thousand, fifteen".

Divisors: 1 5 7 35 229 1145 1603 8015