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13130221 = 132713727
BaseRepresentation
bin110010000101…
…100111101101
3220201002021111
4302011213231
511330131341
61145232021
7216414346
oct62054755
926632244
1013130221
117458a25
124492611
132949580
141a5b0cd
151245681
hexc859ed

13130221 has 8 divisors (see below), whose sum is σ = 14196224. Its totient is φ = 12072240.

The previous prime is 13130177. The next prime is 13130231. The reversal of 13130221 is 12203131.

13130221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13130221 - 217 = 12999149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13130231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1660 + ... + 5386.

It is an arithmetic number, because the mean of its divisors is an integer number (1774528).

Almost surely, 213130221 is an apocalyptic number.

It is an amenable number.

13130221 is a deficient number, since it is larger than the sum of its proper divisors (1066003).

13130221 is a wasteful number, since it uses less digits than its factorization.

13130221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4011.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 13130221 is about 3623.5646813601. The cubic root of 13130221 is about 235.9159724317.

Adding to 13130221 its reverse (12203131), we get a palindrome (25333352).

The spelling of 13130221 in words is "thirteen million, one hundred thirty thousand, two hundred twenty-one".

Divisors: 1 13 271 3523 3727 48451 1010017 13130221