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83246881 = 197422573
BaseRepresentation
bin1001111011000…
…11111100100001
312210122101020211
410331203330201
5132302400011
612132134121
72030405164
oct475437441
9183571224
1083246881
1142a99683
1223a67341
1314329213
14b0adadb
157495b21
hex4f63f21

83246881 has 4 divisors (see below), whose sum is σ = 83669652. Its totient is φ = 82824112.

The previous prime is 83246879. The next prime is 83246887. The reversal of 83246881 is 18864238.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18864238 = 29432119.

It can be written as a sum of positive squares in 2 ways, for example, as 43758225 + 39488656 = 6615^2 + 6284^2 .

It is a cyclic number.

It is not a de Polignac number, because 83246881 - 21 = 83246879 is a prime.

It is a super-2 number, since 2×832468812 = 13860086392456322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83246887) 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, 211090 + ... + 211483.

It is an arithmetic number, because the mean of its divisors is an integer number (20917413).

Almost surely, 283246881 is an apocalyptic number.

It is an amenable number.

83246881 is a deficient number, since it is larger than the sum of its proper divisors (422771).

83246881 is a wasteful number, since it uses less digits than its factorization.

83246881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422770.

The product of its digits is 73728, while the sum is 40.

The square root of 83246881 is about 9123.9728736993. The cubic root of 83246881 is about 436.6391339658.

The spelling of 83246881 in words is "eighty-three million, two hundred forty-six thousand, eight hundred eighty-one".

Divisors: 1 197 422573 83246881