Search a number
-
+
8195281 = 49116691
BaseRepresentation
bin11111010000110011010001
3120102100210221
4133100303101
54044222111
6451353041
7126441643
oct37206321
916370727
108195281
114698266
1228b2781
13190c2a3
141134893
15abd371
hex7d0cd1

8195281 has 4 divisors (see below), whose sum is σ = 8212464. Its totient is φ = 8178100.

The previous prime is 8195273. The next prime is 8195287. The reversal of 8195281 is 1825918.

8195281 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1825918 = 2912959.

It is a cyclic number.

It is not a de Polignac number, because 8195281 - 23 = 8195273 is a prime.

It is a super-2 number, since 2×81952812 = 134325261337922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8195287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7855 + ... + 8836.

It is an arithmetic number, because the mean of its divisors is an integer number (2053116).

Almost surely, 28195281 is an apocalyptic number.

It is an amenable number.

8195281 is a deficient number, since it is larger than the sum of its proper divisors (17183).

8195281 is a wasteful number, since it uses less digits than its factorization.

8195281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17182.

The product of its digits is 5760, while the sum is 34.

The square root of 8195281 is about 2862.7401209331. The cubic root of 8195281 is about 201.6142771577.

The spelling of 8195281 in words is "eight million, one hundred ninety-five thousand, two hundred eighty-one".

Divisors: 1 491 16691 8195281