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13219207 = 53249419
BaseRepresentation
bin110010011011…
…010110000111
3220212121100021
4302123112013
511341003312
61151200011
7220234651
oct62332607
926777307
1013219207
117509871
124516007
13297ac21
141a816d1
151261c07
hexc9b587

13219207 has 4 divisors (see below), whose sum is σ = 13468680. Its totient is φ = 12969736.

The previous prime is 13219177. The next prime is 13219211. The reversal of 13219207 is 70291231.

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

It is not a de Polignac number, because 13219207 - 223 = 4830599 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 (13211207) 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, 124657 + ... + 124762.

It is an arithmetic number, because the mean of its divisors is an integer number (3367170).

Almost surely, 213219207 is an apocalyptic number.

13219207 is a deficient number, since it is larger than the sum of its proper divisors (249473).

13219207 is an equidigital number, since it uses as much as digits as its factorization.

13219207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249472.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 13219207 is about 3635.8227404537. The cubic root of 13219207 is about 236.4477220870.

The spelling of 13219207 in words is "thirteen million, two hundred nineteen thousand, two hundred seven".

Divisors: 1 53 249419 13219207