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228145142 = 22319924923
BaseRepresentation
bin11011001100100…
…11011111110110
3120220021222022002
431212103133312
5431401121032
634345535302
75440126121
oct1546233766
9526258262
10228145142
11107866905
12644a4532
133835cc34
142242b3b8
1515068862
hexd9937f6

228145142 has 16 divisors (see below), whose sum is σ = 358905600. Its totient is φ = 108560232.

The previous prime is 228145123. The next prime is 228145187. The reversal of 228145142 is 241541822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3308 + ... + 21615.

It is an arithmetic number, because the mean of its divisors is an integer number (22431600).

Almost surely, 2228145142 is an apocalyptic number.

228145142 is a deficient number, since it is larger than the sum of its proper divisors (130760458).

228145142 is a wasteful number, since it uses less digits than its factorization.

228145142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25147.

The product of its digits is 5120, while the sum is 29.

The square root of 228145142 is about 15104.4742377880. The cubic root of 228145142 is about 611.0410798452.

Adding to 228145142 its reverse (241541822), we get a palindrome (469686964).

The spelling of 228145142 in words is "two hundred twenty-eight million, one hundred forty-five thousand, one hundred forty-two".

Divisors: 1 2 23 46 199 398 4577 9154 24923 49846 573229 1146458 4959677 9919354 114072571 228145142