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228145135 = 545629027
BaseRepresentation
bin11011001100100…
…11011111101111
3120220021222021211
431212103133233
5431401121020
634345535251
75440126111
oct1546233757
9526258254
10228145135
111078668a9
12644a4527
133835cc2a
142242b3b1
151506885a
hexd9937ef

228145135 has 4 divisors (see below), whose sum is σ = 273774168. Its totient is φ = 182516104.

The previous prime is 228145123. The next prime is 228145187. The reversal of 228145135 is 531541822.

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

It is a cyclic number.

It is not a de Polignac number, because 228145135 - 217 = 228014063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228145097 and 228145106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22814509 + ... + 22814518.

It is an arithmetic number, because the mean of its divisors is an integer number (68443542).

Almost surely, 2228145135 is an apocalyptic number.

228145135 is a deficient number, since it is larger than the sum of its proper divisors (45629033).

228145135 is an equidigital number, since it uses as much as digits as its factorization.

228145135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45629032.

The product of its digits is 9600, while the sum is 31.

The square root of 228145135 is about 15104.4740060685. The cubic root of 228145135 is about 611.0410735958.

Adding to 228145135 its reverse (531541822), we get a palindrome (759686957).

The spelling of 228145135 in words is "two hundred twenty-eight million, one hundred forty-five thousand, one hundred thirty-five".

Divisors: 1 5 45629027 228145135