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13223741 = 28346727
BaseRepresentation
bin110010011100…
…011100111101
3220212211120012
4302130130331
511341124431
61151233005
7220254116
oct62343475
926784505
1013223741
117512213
124518765
13297cccb
141a8320d
15126322b
hexc9c73d

13223741 has 4 divisors (see below), whose sum is σ = 13270752. Its totient is φ = 13176732.

The previous prime is 13223699. The next prime is 13223759. The reversal of 13223741 is 14732231.

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: 14732231 = 21169821.

It is a cyclic number.

It is not a de Polignac number, because 13223741 - 210 = 13222717 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 (13223761) 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, 23081 + ... + 23646.

It is an arithmetic number, because the mean of its divisors is an integer number (3317688).

Almost surely, 213223741 is an apocalyptic number.

It is an amenable number.

13223741 is a deficient number, since it is larger than the sum of its proper divisors (47011).

13223741 is an equidigital number, since it uses as much as digits as its factorization.

13223741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47010.

The product of its digits is 1008, while the sum is 23.

The square root of 13223741 is about 3636.4462047444. The cubic root of 13223741 is about 236.4747517322.

Adding to 13223741 its reverse (14732231), we get a palindrome (27955972).

The spelling of 13223741 in words is "thirteen million, two hundred twenty-three thousand, seven hundred forty-one".

Divisors: 1 283 46727 13223741