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130205131 = 789208997
BaseRepresentation
bin1111100001011…
…00010111001011
3100002000002212021
413300230113023
5231313031011
620530425311
73140503540
oct760542713
9302002767
10130205131
1167552051
1237732237
1320c8ac74
1413414bc7
15b66e471
hex7c2c5cb

130205131 has 8 divisors (see below), whose sum is σ = 150478560. Its totient is φ = 110349888.

The previous prime is 130205129. The next prime is 130205143. The reversal of 130205131 is 131502031.

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 130205131 - 21 = 130205129 is a prime.

It is a super-2 number, since 2×1302051312 = 33906752277454322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130205111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103876 + ... + 105121.

It is an arithmetic number, because the mean of its divisors is an integer number (18809820).

Almost surely, 2130205131 is an apocalyptic number.

130205131 is a deficient number, since it is larger than the sum of its proper divisors (20273429).

130205131 is an equidigital number, since it uses as much as digits as its factorization.

130205131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209093.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 130205131 is about 11410.7462946119. The cubic root of 130205131 is about 506.8460111196.

Adding to 130205131 its reverse (131502031), we get a palindrome (261707162).

The spelling of 130205131 in words is "one hundred thirty million, two hundred five thousand, one hundred thirty-one".

Divisors: 1 7 89 623 208997 1462979 18600733 130205131