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131160031 = 839156329
BaseRepresentation
bin1111101000101…
…01011111011111
3100010210121201221
413310111133133
5232034110111
621003114211
73151561522
oct764253737
9303717657
10131160031
1168044522
1237b12967
13212337b2
14135c2bb9
15b7ac371
hex7d157df

131160031 has 4 divisors (see below), whose sum is σ = 131317200. Its totient is φ = 131002864.

The previous prime is 131159999. The next prime is 131160061. The reversal of 131160031 is 130061131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130061131 = 281462851.

It is a cyclic number.

It is not a de Polignac number, because 131160031 - 25 = 131159999 is a prime.

It is a super-2 number, since 2×1311600312 = 34405907463841922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131159987 and 131160014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131160061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77326 + ... + 79003.

It is an arithmetic number, because the mean of its divisors is an integer number (32829300).

Almost surely, 2131160031 is an apocalyptic number.

131160031 is a deficient number, since it is larger than the sum of its proper divisors (157169).

131160031 is an equidigital number, since it uses as much as digits as its factorization.

131160031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157168.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 131160031 is about 11452.5119951913. The cubic root of 131160031 is about 508.0820322917.

The spelling of 131160031 in words is "one hundred thirty-one million, one hundred sixty thousand, thirty-one".

Divisors: 1 839 156329 131160031