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130217 = 197661
BaseRepresentation
bin11111110010101001
320121121212
4133302221
513131332
62442505
71051433
oct376251
9217555
10130217
118991a
1263435
1347369
1435653
15288b2
hex1fca9

130217 has 4 divisors (see below), whose sum is σ = 131076. Its totient is φ = 129360.

The previous prime is 130211. The next prime is 130223. The reversal of 130217 is 712031.

130217 is nontrivially palindromic in base 14.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 712031 = 5871213.

It is an interprime number because it is at equal distance from previous prime (130211) and next prime (130223).

It can be written as a sum of positive squares in 2 ways, for example, as 118336 + 11881 = 344^2 + 109^2 .

It is a cyclic number.

It is not a de Polignac number, because 130217 - 24 = 130201 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134 + ... + 527.

It is an arithmetic number, because the mean of its divisors is an integer number (32769).

2130217 is an apocalyptic number.

It is an amenable number.

130217 is a deficient number, since it is larger than the sum of its proper divisors (859).

130217 is an equidigital number, since it uses as much as digits as its factorization.

130217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 130217 is about 360.8559269293. The cubic root of 130217 is about 50.6861411364.

Adding to 130217 its reverse (712031), we get a palindrome (842248).

The spelling of 130217 in words is "one hundred thirty thousand, two hundred seventeen".

Divisors: 1 197 661 130217