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228015 = 345563
BaseRepresentation
bin110111101010101111
3102120210000
4313222233
524244030
64515343
71636524
oct675257
9376700
10228015
11146347
12abb53
137ca28
145d14b
1547860
hex37aaf

228015 has 20 divisors (see below), whose sum is σ = 409464. Its totient is φ = 121392.

The previous prime is 228013. The next prime is 228023. The reversal of 228015 is 510822.

Adding to 228015 its reverse (510822), we get a palindrome (738837).

It is not a de Polignac number, because 228015 - 21 = 228013 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228013) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 124 + ... + 686.

2228015 is an apocalyptic number.

228015 is a deficient number, since it is larger than the sum of its proper divisors (181449).

228015 is an equidigital number, since it uses as much as digits as its factorization.

228015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580 (or 571 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 228015 is about 477.5091622158. The cubic root of 228015 is about 61.0924871317.

The spelling of 228015 in words is "two hundred twenty-eight thousand, fifteen".

Divisors: 1 3 5 9 15 27 45 81 135 405 563 1689 2815 5067 8445 15201 25335 45603 76005 228015