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131200131 = 343733377
BaseRepresentation
bin1111101000111…
…11010010000011
3100010212122202010
413310133102003
5232041401011
621004024003
73152116446
oct764372203
9303778663
10131200131
1168071667
1237b32003
1321248b1a
14135d365d
15b7b91a6
hex7d1f483

131200131 has 4 divisors (see below), whose sum is σ = 174933512. Its totient is φ = 87466752.

The previous prime is 131200117. The next prime is 131200141. The reversal of 131200131 is 131002131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 131200131 - 25 = 131200099 is a prime.

It is a super-2 number, since 2×1312001312 = 34426948748834322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131200141) 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, 21866686 + ... + 21866691.

It is an arithmetic number, because the mean of its divisors is an integer number (43733378).

Almost surely, 2131200131 is an apocalyptic number.

131200131 is a deficient number, since it is larger than the sum of its proper divisors (43733381).

131200131 is an equidigital number, since it uses as much as digits as its factorization.

131200131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43733380.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 131200131 is about 11454.2625690177. The cubic root of 131200131 is about 508.1338062286.

Adding to 131200131 its reverse (131002131), we get a palindrome (262202262).

The spelling of 131200131 in words is "one hundred thirty-one million, two hundred thousand, one hundred thirty-one".

Divisors: 1 3 43733377 131200131