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131310143 = 472927767
BaseRepresentation
bin1111101001110…
…10001000111111
3100011002020122122
413310322020333
5232103411033
621010233155
73153055256
oct764721077
9304066578
10131310143
1168137288
1237b857bb
1321286c13
141362179d
15b7dba98
hex7d3a23f

131310143 has 4 divisors (see below), whose sum is σ = 131342640. Its totient is φ = 131277648.

The previous prime is 131310119. The next prime is 131310187. The reversal of 131310143 is 341013131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 341013131 = 1090331277.

It is a cyclic number.

It is not a de Polignac number, because 131310143 - 220 = 130261567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131310043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9155 + ... + 18612.

It is an arithmetic number, because the mean of its divisors is an integer number (32835660).

Almost surely, 2131310143 is an apocalyptic number.

131310143 is a deficient number, since it is larger than the sum of its proper divisors (32497).

131310143 is an equidigital number, since it uses as much as digits as its factorization.

131310143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32496.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 131310143 is about 11459.0637924745. The cubic root of 131310143 is about 508.2757908409.

Adding to 131310143 its reverse (341013131), we get a palindrome (472323274).

The spelling of 131310143 in words is "one hundred thirty-one million, three hundred ten thousand, one hundred forty-three".

Divisors: 1 4729 27767 131310143