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85048105 = 517009621
BaseRepresentation
bin1010001000110…
…11101100101001
312221000220001211
411010123230221
5133233014410
612234513121
72051616442
oct504335451
9187026054
1085048105
114400999a
12245957a1
131480a02c
14b41c2c9
1576ee68a
hex511bb29

85048105 has 4 divisors (see below), whose sum is σ = 102057732. Its totient is φ = 68038480.

The previous prime is 85048079. The next prime is 85048121. The reversal of 85048105 is 50184058.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50184058 = 225092029.

It can be written as a sum of positive squares in 2 ways, for example, as 17413929 + 67634176 = 4173^2 + 8224^2 .

It is a de Polignac number, because none of the positive numbers 2k-85048105 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8504806 + ... + 8504815.

It is an arithmetic number, because the mean of its divisors is an integer number (25514433).

Almost surely, 285048105 is an apocalyptic number.

It is an amenable number.

85048105 is a deficient number, since it is larger than the sum of its proper divisors (17009627).

85048105 is a wasteful number, since it uses less digits than its factorization.

85048105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17009626.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 85048105 is about 9222.1529482003. The cubic root of 85048105 is about 439.7658964720.

The spelling of 85048105 in words is "eighty-five million, forty-eight thousand, one hundred five".

Divisors: 1 5 17009621 85048105