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13223141 = 82316067
BaseRepresentation
bin110010011100…
…010011100101
3220212210201222
4302130103211
511341120031
61151230125
7220252301
oct62342345
926783658
1013223141
117511818
124518345
13297c959
141a82d01
151262e7b
hexc9c4e5

13223141 has 4 divisors (see below), whose sum is σ = 13240032. Its totient is φ = 13206252.

The previous prime is 13223123. The next prime is 13223173. The reversal of 13223141 is 14132231.

13223141 is digitally balanced in base 2, 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14132231 = 79178889.

It is a cyclic number.

It is not a de Polignac number, because 13223141 - 214 = 13206757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13223191) 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, 7211 + ... + 8856.

It is an arithmetic number, because the mean of its divisors is an integer number (3310008).

Almost surely, 213223141 is an apocalyptic number.

It is an amenable number.

13223141 is a deficient number, since it is larger than the sum of its proper divisors (16891).

13223141 is an equidigital number, since it uses as much as digits as its factorization.

13223141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16890.

The product of its digits is 144, while the sum is 17.

The square root of 13223141 is about 3636.3637056818. The cubic root of 13223141 is about 236.4711751600.

Adding to 13223141 its reverse (14132231), we get a palindrome (27355372).

The spelling of 13223141 in words is "thirteen million, two hundred twenty-three thousand, one hundred forty-one".

Divisors: 1 823 16067 13223141