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131366219 = 34721091
BaseRepresentation
bin1111101010001…
…11110101001011
3100011012002120112
413311013311023
5232112204334
621011344535
73153410615
oct765076513
9304162515
10131366219
1168175426
1237bb214b
13212a65ba
1413637db5
15b7ed4ce
hex7d47d4b

131366219 has 6 divisors (see below), whose sum is σ = 131866644. Its totient is φ = 130867580.

The previous prime is 131366159. The next prime is 131366231. The reversal of 131366219 is 912663131.

It is not a de Polignac number, because 131366219 - 212 = 131362123 is a prime.

It is a super-2 number, since 2×1313662192 = 34514166988711922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131366239) 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 5 ways as a sum of consecutive naturals, for example, 119864 + ... + 120954.

It is an arithmetic number, because the mean of its divisors is an integer number (21977774).

Almost surely, 2131366219 is an apocalyptic number.

131366219 is a deficient number, since it is larger than the sum of its proper divisors (500425).

131366219 is an frugal number, since it uses more digits than its factorization.

131366219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785 (or 1438 counting only the distinct ones).

The product of its digits is 5832, while the sum is 32.

The square root of 131366219 is about 11461.5103280501. The cubic root of 131366219 is about 508.3481336071.

The spelling of 131366219 in words is "one hundred thirty-one million, three hundred sixty-six thousand, two hundred nineteen".

Divisors: 1 347 1091 120409 378577 131366219