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13142213 = 71877459
BaseRepresentation
bin110010001000…
…100011000101
3220201200201122
4302020203011
511331022323
61145403325
7216464330
oct62104305
926650648
1013142213
117466a37
124499545
132951b76
141a61617
151248ec8
hexc888c5

13142213 has 4 divisors (see below), whose sum is σ = 15019680. Its totient is φ = 11264748.

The previous prime is 13142197. The next prime is 13142231. The reversal of 13142213 is 31224131.

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.

It is a cyclic number.

It is not a de Polignac number, because 13142213 - 24 = 13142197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13142191 and 13142200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13142413) 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, 938723 + ... + 938736.

It is an arithmetic number, because the mean of its divisors is an integer number (3754920).

Almost surely, 213142213 is an apocalyptic number.

It is an amenable number.

13142213 is a deficient number, since it is larger than the sum of its proper divisors (1877467).

13142213 is an equidigital number, since it uses as much as digits as its factorization.

13142213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1877466.

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

The square root of 13142213 is about 3625.2190278658. The cubic root of 13142213 is about 235.9877722765.

Adding to 13142213 its reverse (31224131), we get a palindrome (44366344).

The spelling of 13142213 in words is "thirteen million, one hundred forty-two thousand, two hundred thirteen".

Divisors: 1 7 1877459 13142213