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131227807 = 4719714173
BaseRepresentation
bin1111101001001…
…10000010011111
3100010221001201011
413310212002133
5232043242212
621004400051
73152263234
oct764460237
9303831634
10131227807
1168090437
1237b46027
13212585b9
14135dd78b
15b7c24a7
hex7d2609f

131227807 has 8 divisors (see below), whose sum is σ = 134709696. Its totient is φ = 127774752.

The previous prime is 131227751. The next prime is 131227829. The reversal of 131227807 is 708722131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131227807 - 219 = 130703519 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 (131227307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2173 + ... + 16345.

It is an arithmetic number, because the mean of its divisors is an integer number (16838712).

Almost surely, 2131227807 is an apocalyptic number.

131227807 is a deficient number, since it is larger than the sum of its proper divisors (3481889).

131227807 is a wasteful number, since it uses less digits than its factorization.

131227807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14417.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 131227807 is about 11455.4706145143. The cubic root of 131227807 is about 508.1695331302.

Adding to 131227807 its reverse (708722131), we get a palindrome (839949938).

The spelling of 131227807 in words is "one hundred thirty-one million, two hundred twenty-seven thousand, eight hundred seven".

Divisors: 1 47 197 9259 14173 666131 2792081 131227807