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228101383 = 499457117
BaseRepresentation
bin11011001100010…
…00110100000111
3120220012202021101
431212020310013
5431343221013
634345000531
75436554416
oct1546106407
9526182241
10228101383
11107836a44
1264483147
1338346043
142241947d
151505a8dd
hexd988d07

228101383 has 4 divisors (see below), whose sum is σ = 228559000. Its totient is φ = 227643768.

The previous prime is 228101353. The next prime is 228101407. The reversal of 228101383 is 383101822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 383101822 = 2191550911.

It is a cyclic number.

It is not a de Polignac number, because 228101383 - 25 = 228101351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228101323) 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, 228060 + ... + 229057.

It is an arithmetic number, because the mean of its divisors is an integer number (57139750).

Almost surely, 2228101383 is an apocalyptic number.

228101383 is a deficient number, since it is larger than the sum of its proper divisors (457617).

228101383 is an equidigital number, since it uses as much as digits as its factorization.

228101383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457616.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 228101383 is about 15103.0256240265. The cubic root of 228101383 is about 611.0020107741.

It can be divided in two parts, 228101 and 383, that added together give a square (228484 = 4782).

The spelling of 228101383 in words is "two hundred twenty-eight million, one hundred one thousand, three hundred eighty-three".

Divisors: 1 499 457117 228101383