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131710105 = 526342021
BaseRepresentation
bin1111101100110…
…11110010011001
3100011211120022001
413312123302121
5232204210410
621023001001
73156342322
oct766336231
9304746261
10131710105
116838a82a
1238139161
1321396c97
14136c7449
15b86a33a
hex7d9bc99

131710105 has 4 divisors (see below), whose sum is σ = 158052132. Its totient is φ = 105368080.

The previous prime is 131710099. The next prime is 131710129. The reversal of 131710105 is 501017131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30647296 + 101062809 = 5536^2 + 10053^2 .

It is not a de Polignac number, because 131710105 - 217 = 131579033 is a prime.

It is a super-2 number, since 2×1317101052 = 34695103518222050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13171006 + ... + 13171015.

It is an arithmetic number, because the mean of its divisors is an integer number (39513033).

Almost surely, 2131710105 is an apocalyptic number.

It is an amenable number.

131710105 is a deficient number, since it is larger than the sum of its proper divisors (26342027).

131710105 is an equidigital number, since it uses as much as digits as its factorization.

131710105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26342026.

The product of its (nonzero) digits is 105, while the sum is 19.

The square root of 131710105 is about 11476.5022981743. The cubic root of 131710105 is about 508.7913258994.

Adding to 131710105 its reverse (501017131), we get a palindrome (632727236).

The spelling of 131710105 in words is "one hundred thirty-one million, seven hundred ten thousand, one hundred five".

Divisors: 1 5 26342021 131710105