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228144365 = 5172126513
BaseRepresentation
bin11011001100100…
…11010011101101
3120220021221020022
431212103103231
5431401104430
634345531525
75440123631
oct1546232355
9526257208
10228144365
11107866269
12644a3ba5
133835c787
142242adc1
15150684e5
hexd9934ed

228144365 has 8 divisors (see below), whose sum is σ = 273942648. Its totient is φ = 182402560.

The previous prime is 228144359. The next prime is 228144409. The reversal of 228144365 is 563441822.

It can be written as a sum of positive squares in 4 ways, for example, as 15976009 + 212168356 = 3997^2 + 14566^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2k-228144365 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 4652 + ... + 21861.

It is an arithmetic number, because the mean of its divisors is an integer number (34242831).

Almost surely, 2228144365 is an apocalyptic number.

It is an amenable number.

228144365 is a deficient number, since it is larger than the sum of its proper divisors (45798283).

228144365 is a wasteful number, since it uses less digits than its factorization.

228144365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28239.

The product of its digits is 46080, while the sum is 35.

The square root of 228144365 is about 15104.4485169105. The cubic root of 228144365 is about 611.0403861648.

The spelling of 228144365 in words is "two hundred twenty-eight million, one hundred forty-four thousand, three hundred sixty-five".

Divisors: 1 5 1721 8605 26513 132565 45628873 228144365