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13130057 = 67195971
BaseRepresentation
bin110010000101…
…100101001001
3220201002001102
4302011211021
511330130212
61145231145
7216414023
oct62054511
926632042
1013130057
117458896
1244924b5
132949485
141a5b013
1512455c2
hexc85949

13130057 has 4 divisors (see below), whose sum is σ = 13326096. Its totient is φ = 12934020.

The previous prime is 13130053. The next prime is 13130059. The reversal of 13130057 is 75003131.

It is a happy number.

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: 75003131 = 710714733.

It is a cyclic number.

It is not a de Polignac number, because 13130057 - 22 = 13130053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13130053) 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, 97919 + ... + 98052.

It is an arithmetic number, because the mean of its divisors is an integer number (3331524).

Almost surely, 213130057 is an apocalyptic number.

It is an amenable number.

13130057 is a deficient number, since it is larger than the sum of its proper divisors (196039).

13130057 is an equidigital number, since it uses as much as digits as its factorization.

13130057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196038.

The product of its (nonzero) digits is 315, while the sum is 20.

The square root of 13130057 is about 3623.5420516395. The cubic root of 13130057 is about 235.9149902096.

Adding to 13130057 its reverse (75003131), we get a palindrome (88133188).

The spelling of 13130057 in words is "thirteen million, one hundred thirty thousand, fifty-seven".

Divisors: 1 67 195971 13130057