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7130131 = 43165817
BaseRepresentation
bin11011001100110000010011
3111102020200221
4123030300103
53311131011
6412453511
7114414361
oct33146023
914366627
107130131
11402aa78
12247a297
131628518
14d38631
1595c971
hex6ccc13

7130131 has 4 divisors (see below), whose sum is σ = 7295992. Its totient is φ = 6964272.

The previous prime is 7130119. The next prime is 7130141. The reversal of 7130131 is 1310317.

It is a happy number.

7130131 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1310317 = 2415437.

It is a cyclic number.

It is not a de Polignac number, because 7130131 - 27 = 7130003 is a prime.

It is a super-2 number, since 2×71301312 = 101677536154322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7130141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82866 + ... + 82951.

It is an arithmetic number, because the mean of its divisors is an integer number (1823998).

Almost surely, 27130131 is an apocalyptic number.

7130131 is a deficient number, since it is larger than the sum of its proper divisors (165861).

7130131 is a wasteful number, since it uses less digits than its factorization.

7130131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165860.

The product of its (nonzero) digits is 63, while the sum is 16.

The square root of 7130131 is about 2670.2305143938. The cubic root of 7130131 is about 192.4712364962.

Adding to 7130131 its reverse (1310317), we get a palindrome (8440448).

The spelling of 7130131 in words is "seven million, one hundred thirty thousand, one hundred thirty-one".

Divisors: 1 43 165817 7130131