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13313021 = 23578827
BaseRepresentation
bin110010110010…
…001111111101
3221001101000212
4302302033331
511402004041
61153202205
7221105321
oct62621775
927041025
1013313021
1175732a7
124560365
1329b1837
141aa7981
15127e8eb
hexcb23fd

13313021 has 4 divisors (see below), whose sum is σ = 13891872. Its totient is φ = 12734172.

The previous prime is 13313011. The next prime is 13313033. The reversal of 13313021 is 12031331.

Adding to 13313021 its reverse (12031331), we get a palindrome (25344352).

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: 12031331 = 13925487.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-13313021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13312987 and 13313005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13313011) 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, 289391 + ... + 289436.

It is an arithmetic number, because the mean of its divisors is an integer number (3472968).

Almost surely, 213313021 is an apocalyptic number.

It is an amenable number.

13313021 is a deficient number, since it is larger than the sum of its proper divisors (578851).

13313021 is an equidigital number, since it uses as much as digits as its factorization.

13313021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578850.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 13313021 is about 3648.7012757966. The cubic root of 13313021 is about 237.0057444292.

The spelling of 13313021 in words is "thirteen million, three hundred thirteen thousand, twenty-one".

Divisors: 1 23 578827 13313021