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2915 = 51153
BaseRepresentation
bin101101100011
310222222
4231203
543130
621255
711333
oct5543
93888
102915
112210
12182b
131433
1410c3
15ce5
hexb63

2915 has 8 divisors (see below), whose sum is σ = 3888. Its totient is φ = 2080.

The previous prime is 2909. The next prime is 2917. The reversal of 2915 is 5192.

It can be divided in two parts, 29 and 15, that multiplied together give a triangular number (435 = T29).

2915 = T4 + T5 + ... + T25.

It is a Cunningham number, because it is equal to 542-1.

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

It is not a de Polignac number, because 2915 - 26 = 2851 is a prime.

It is a Duffinian number.

It is a plaindrome in base 7 and base 9.

It is a nialpdrome in base 8, base 11 and base 16.

It is a zygodrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 2893 and 2902.

It is not an unprimeable number, because it can be changed into a prime (2917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29 + ... + 81.

It is an arithmetic number, because the mean of its divisors is an integer number (486).

2915 is a deficient number, since it is larger than the sum of its proper divisors (973).

2915 is a wasteful number, since it uses less digits than its factorization.

2915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69.

The product of its digits is 90, while the sum is 17.

The square root of 2915 is about 53.9907399468. The cubic root of 2915 is about 14.2849761523.

The spelling of 2915 in words is "two thousand, nine hundred fifteen".

Divisors: 1 5 11 53 55 265 583 2915