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13212667 = 131016359
BaseRepresentation
bin110010011001…
…101111111011
3220212021101001
4302121233323
511340301132
61151105431
7220206616
oct62315773
926767331
1013212667
117504966
124512277
132977c60
141a7d17d
15125ece7
hexc99bfb

13212667 has 4 divisors (see below), whose sum is σ = 14229040. Its totient is φ = 12196296.

The previous prime is 13212643. The next prime is 13212677. The reversal of 13212667 is 76621231.

13212667 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76621231 = 79969889.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-13212667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13212607) 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, 508167 + ... + 508192.

It is an arithmetic number, because the mean of its divisors is an integer number (3557260).

Almost surely, 213212667 is an apocalyptic number.

13212667 is a deficient number, since it is larger than the sum of its proper divisors (1016373).

13212667 is a wasteful number, since it uses less digits than its factorization.

13212667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016372.

The product of its digits is 3024, while the sum is 28.

The square root of 13212667 is about 3634.9232454070. The cubic root of 13212667 is about 236.4087226929.

Adding to 13212667 its reverse (76621231), we get a palindrome (89833898).

The spelling of 13212667 in words is "thirteen million, two hundred twelve thousand, six hundred sixty-seven".

Divisors: 1 13 1016359 13212667