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BaseRepresentation
bin11011010000110…
…01110111001001
3120221022221020121
431220121313021
5432021223442
634405423241
75444610502
oct1550316711
9527287217
10228695497
11108102348
126470ab21
13384c35a4
1422531ba9
1515126967
hexda19dc9

228695497 has 4 divisors (see below), whose sum is σ = 228739716. Its totient is φ = 228651280.

The previous prime is 228695471. The next prime is 228695501. The reversal of 228695497 is 794596822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 794596822 = 2397298411.

It can be written as a sum of positive squares in 2 ways, for example, as 48706441 + 179989056 = 6979^2 + 13416^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-228695497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228693497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13138 + ... + 25099.

It is an arithmetic number, because the mean of its divisors is an integer number (57184929).

It is a 5172-hyperperfect number.

Almost surely, 2228695497 is an apocalyptic number.

It is an amenable number.

228695497 is a deficient number, since it is larger than the sum of its proper divisors (44219).

228695497 is an equidigital number, since it uses as much as digits as its factorization.

228695497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44218.

The product of its digits is 2177280, while the sum is 52.

The square root of 228695497 is about 15122.6815413140. The cubic root of 228695497 is about 611.5320238436.

The spelling of 228695497 in words is "two hundred twenty-eight million, six hundred ninety-five thousand, four hundred ninety-seven".

Divisors: 1 5981 38237 228695497