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13210207 = 17777071
BaseRepresentation
bin110010011001…
…001001011111
3220212010222221
4302121021133
511340211312
61151050211
7220166503
oct62311137
926763887
1013210207
11750302a
124510967
132976aba
141a7c303
15125e207
hexc9925f

13210207 has 4 divisors (see below), whose sum is σ = 13987296. Its totient is φ = 12433120.

The previous prime is 13210177. The next prime is 13210213. The reversal of 13210207 is 70201231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70201231 = 239293729.

It is not a de Polignac number, because 13210207 - 211 = 13208159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13210237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388519 + ... + 388552.

It is an arithmetic number, because the mean of its divisors is an integer number (3496824).

Almost surely, 213210207 is an apocalyptic number.

13210207 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

13210207 is a deficient number, since it is larger than the sum of its proper divisors (777089).

13210207 is an equidigital number, since it uses as much as digits as its factorization.

13210207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777088.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 13210207 is about 3634.5848456185. The cubic root of 13210207 is about 236.3940498654.

Adding to 13210207 its reverse (70201231), we get a palindrome (83411438).

The spelling of 13210207 in words is "thirteen million, two hundred ten thousand, two hundred seven".

Divisors: 1 17 777071 13210207