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228145115 = 51141101173
BaseRepresentation
bin11011001100100…
…11011111011011
3120220021222021002
431212103133123
5431401120430
634345535215
75440126052
oct1546233733
9526258232
10228145115
11107866890
12644a450b
133835cc13
142242b399
1515068845
hexd9937db

228145115 has 16 divisors (see below), whose sum is σ = 305950176. Its totient is φ = 161875200.

The previous prime is 228145111. The next prime is 228145121. The reversal of 228145115 is 511541822.

It is not a de Polignac number, because 228145115 - 22 = 228145111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228145111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48332 + ... + 52841.

It is an arithmetic number, because the mean of its divisors is an integer number (19121886).

Almost surely, 2228145115 is an apocalyptic number.

228145115 is a deficient number, since it is larger than the sum of its proper divisors (77805061).

228145115 is a wasteful number, since it uses less digits than its factorization.

228145115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101230.

The product of its digits is 3200, while the sum is 29.

The square root of 228145115 is about 15104.4733440130. The cubic root of 228145115 is about 611.0410557405.

Adding to 228145115 its reverse (511541822), we get a palindrome (739686937).

The spelling of 228145115 in words is "two hundred twenty-eight million, one hundred forty-five thousand, one hundred fifteen".

Divisors: 1 5 11 41 55 205 451 2255 101173 505865 1112903 4148093 5564515 20740465 45629023 228145115