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207131 = 434817
BaseRepresentation
bin110010100100011011
3101112010112
4302210123
523112011
64234535
71521611
oct624433
9345115
10207131
11131691
129ba4b
1373382
14556b1
154158b
hex3291b

207131 has 4 divisors (see below), whose sum is σ = 211992. Its totient is φ = 202272.

The previous prime is 207127. The next prime is 207139. The reversal of 207131 is 131702.

207131 is digitally balanced in base 2, 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: 131702 = 265851.

It is not a de Polignac number, because 207131 - 22 = 207127 is a prime.

It is a super-2 number, since 2×2071312 = 85806502322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (207139) 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, 2366 + ... + 2451.

It is an arithmetic number, because the mean of its divisors is an integer number (52998).

2207131 is an apocalyptic number.

207131 is a deficient number, since it is larger than the sum of its proper divisors (4861).

207131 is an equidigital number, since it uses as much as digits as its factorization.

207131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4860.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 207131 is about 455.1164686100. The cubic root of 207131 is about 59.1672930790.

Adding to 207131 its reverse (131702), we get a palindrome (338833).

The spelling of 207131 in words is "two hundred seven thousand, one hundred thirty-one".

Divisors: 1 43 4817 207131