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10228129 = 18156509
BaseRepresentation
bin100111000001…
…000110100001
3201020122100121
4213001012201
510104300004
61003120241
7152636422
oct47010641
921218317
1010228129
1158565aa
123513081
132171662
141503649
15d70854
hex9c11a1

10228129 has 4 divisors (see below), whose sum is σ = 10284820. Its totient is φ = 10171440.

The previous prime is 10228121. The next prime is 10228139. The reversal of 10228129 is 92182201.

10228129 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92182201 = 701131501.

It can be written as a sum of positive squares in 2 ways, for example, as 2117025 + 8111104 = 1455^2 + 2848^2 .

It is a cyclic number.

It is not a de Polignac number, because 10228129 - 23 = 10228121 is a prime.

It is a super-2 number, since 2×102281292 = 209229245681282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10228121) 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, 28074 + ... + 28435.

It is an arithmetic number, because the mean of its divisors is an integer number (2571205).

Almost surely, 210228129 is an apocalyptic number.

It is an amenable number.

10228129 is a deficient number, since it is larger than the sum of its proper divisors (56691).

10228129 is an equidigital number, since it uses as much as digits as its factorization.

10228129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56690.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 10228129 is about 3198.1446183686. The cubic root of 10228129 is about 217.0694632044.

The spelling of 10228129 in words is "ten million, two hundred twenty-eight thousand, one hundred twenty-nine".

Divisors: 1 181 56509 10228129