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131310885 = 3531282389
BaseRepresentation
bin1111101001110…
…10010100100101
3100011002021200010
413310322110211
5232103422020
621010240433
73153060366
oct764722445
9304067603
10131310885
11681378a2
1237b86119
1321287364
1413621b6d
15b7dbde0
hex7d3a525

131310885 has 16 divisors (see below), whose sum is σ = 216875520. Its totient is φ = 67773120.

The previous prime is 131310871. The next prime is 131310899. The reversal of 131310885 is 588013131.

It is an interprime number because it is at equal distance from previous prime (131310871) and next prime (131310899).

It is not a de Polignac number, because 131310885 - 25 = 131310853 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140730 + ... + 141659.

It is an arithmetic number, because the mean of its divisors is an integer number (13554720).

Almost surely, 2131310885 is an apocalyptic number.

131310885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131310885 is a deficient number, since it is larger than the sum of its proper divisors (85564635).

131310885 is a wasteful number, since it uses less digits than its factorization.

131310885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282428.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 131310885 is about 11459.0961685466. The cubic root of 131310885 is about 508.2767482179.

The spelling of 131310885 in words is "one hundred thirty-one million, three hundred ten thousand, eight hundred eighty-five".

Divisors: 1 3 5 15 31 93 155 465 282389 847167 1411945 4235835 8754059 26262177 43770295 131310885