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228145177 = 1317549629
BaseRepresentation
bin11011001100100…
…11100000011001
3120220021222100101
431212103200121
5431401121202
634345535401
75440126201
oct1546234031
9526258311
10228145177
11107866937
12644a4561
133835cc60
142242b401
1515068887
hexd993819

228145177 has 4 divisors (see below), whose sum is σ = 245694820. Its totient is φ = 210595536.

The previous prime is 228145123. The next prime is 228145187. The reversal of 228145177 is 771541822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30349081 + 197796096 = 5509^2 + 14064^2 .

It is a cyclic number.

It is not a de Polignac number, because 228145177 - 211 = 228143129 is a prime.

It is a super-2 number, since 2×2281451772 = 104100443576722658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228145187) 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 3 ways as a sum of consecutive naturals, for example, 8774802 + ... + 8774827.

It is an arithmetic number, because the mean of its divisors is an integer number (61423705).

Almost surely, 2228145177 is an apocalyptic number.

It is an amenable number.

228145177 is a deficient number, since it is larger than the sum of its proper divisors (17549643).

228145177 is a wasteful number, since it uses less digits than its factorization.

228145177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17549642.

The product of its digits is 31360, while the sum is 37.

The square root of 228145177 is about 15104.4753963850. The cubic root of 228145177 is about 611.0411110920.

Adding to 228145177 its reverse (771541822), we get a palindrome (999686999).

The spelling of 228145177 in words is "two hundred twenty-eight million, one hundred forty-five thousand, one hundred seventy-seven".

Divisors: 1 13 17549629 228145177