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318361 = 2411321
BaseRepresentation
bin1001101101110011001
3121011201011
41031232121
540141421
610453521
72464111
oct1155631
9534634
10318361
111a820a
121342a1
13b1ba4
1484041
15644e1
hex4db99

318361 has 4 divisors (see below), whose sum is σ = 319924. Its totient is φ = 316800.

The previous prime is 318349. The next prime is 318377. The reversal of 318361 is 163813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 163813 = 1312601.

It can be written as a sum of positive squares in 2 ways, for example, as 270400 + 47961 = 520^2 + 219^2 .

It is a cyclic number.

It is not a de Polignac number, because 318361 - 27 = 318233 is a prime.

It is a Duffinian number.

318361 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (318301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420 + ... + 901.

It is an arithmetic number, because the mean of its divisors is an integer number (79981).

It is a Poulet number, since it divides 2318360-1.

2318361 is an apocalyptic number.

It is an amenable number.

318361 is a deficient number, since it is larger than the sum of its proper divisors (1563).

318361 is a wasteful number, since it uses less digits than its factorization.

318361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562.

The product of its digits is 432, while the sum is 22.

The square root of 318361 is about 564.2348801696. The cubic root of 318361 is about 68.2820608179.

The spelling of 318361 in words is "three hundred eighteen thousand, three hundred sixty-one".

Divisors: 1 241 1321 318361