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281089082 = 21137731609
BaseRepresentation
bin10000110000010…
…001010000111010
3201120220210201202
4100300101100322
51033424322312
643520414202
76652134461
oct2060212072
9646823652
10281089082
1113473842a
127a177362
1346309301
142948d9d8
1519a259c2
hex10c1143a

281089082 has 16 divisors (see below), whose sum is σ = 426179880. Its totient is φ = 139034112.

The previous prime is 281089079. The next prime is 281089117. The reversal of 281089082 is 280980182.

Adding to 281089082 its reverse (280980182), we get a square (562069264 = 237082).

Subtracting from 281089082 its reverse (280980182), we obtain a square (108900 = 3302).

It can be written as a sum of positive squares in 4 ways, for example, as 173738761 + 107350321 = 13181^2 + 10361^2 .

281089082 is a rare number.

It is a super-2 number, since 2×2810890822 = 158022144039205448, which contains 22 as substring.

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, 173894 + ... + 175502.

Almost surely, 2281089082 is an apocalyptic number.

281089082 is a deficient number, since it is larger than the sum of its proper divisors (145090798).

281089082 is a wasteful number, since it uses less digits than its factorization.

281089082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2497.

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 281089082 is about 16765.7114969810. The cubic root of 281089082 is about 655.0603693168.

The spelling of 281089082 in words is "two hundred eighty-one million, eighty-nine thousand, eighty-two".

Divisors: 1 2 113 226 773 1546 1609 3218 87349 174698 181817 363634 1243757 2487514 140544541 281089082