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131313841 = 311422231
BaseRepresentation
bin1111101001110…
…11000010110001
3100011002102201121
413310323002301
5232104020331
621010302241
73153102121
oct764730261
9304072647
10131313841
116813a03a
1237b87981
13212887c9
1413622c81
15b7dcc11
hex7d3b0b1

131313841 has 4 divisors (see below), whose sum is σ = 131736384. Its totient is φ = 130891300.

The previous prime is 131313823. The next prime is 131313859. The reversal of 131313841 is 148313131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (131313823) and next prime (131313859).

It is a cyclic number.

It is not a de Polignac number, because 131313841 - 217 = 131182769 is a prime.

It is a super-3 number, since 3×1313138413 (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131313811) 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, 210805 + ... + 211426.

It is an arithmetic number, because the mean of its divisors is an integer number (32934096).

Almost surely, 2131313841 is an apocalyptic number.

It is an amenable number.

131313841 is a deficient number, since it is larger than the sum of its proper divisors (422543).

131313841 is an equidigital number, since it uses as much as digits as its factorization.

131313841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422542.

The product of its digits is 864, while the sum is 25.

The square root of 131313841 is about 11459.2251483248. The cubic root of 131313841 is about 508.2805622068.

Adding to 131313841 its reverse (148313131), we get a palindrome (279626972).

The spelling of 131313841 in words is "one hundred thirty-one million, three hundred thirteen thousand, eight hundred forty-one".

Divisors: 1 311 422231 131313841