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13831055 = 57395173
BaseRepresentation
bin110100110000…
…101110001111
3222000200122022
4310300232033
512020043210
61212240355
7225363530
oct64605617
928020568
1013831055
117897527
1247700bb
132b33574
141ba0687
151333155
hexd30b8f

13831055 has 8 divisors (see below), whose sum is σ = 18968352. Its totient is φ = 9484128.

The previous prime is 13831049. The next prime is 13831067. The reversal of 13831055 is 55013831.

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 13831055 - 212 = 13826959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197552 + ... + 197621.

It is an arithmetic number, because the mean of its divisors is an integer number (2371044).

Almost surely, 213831055 is an apocalyptic number.

13831055 is a deficient number, since it is larger than the sum of its proper divisors (5137297).

13831055 is an equidigital number, since it uses as much as digits as its factorization.

13831055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395185.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 13831055 is about 3719.0126377844. The cubic root of 13831055 is about 240.0408206029.

Adding to 13831055 its reverse (55013831), we get a palindrome (68844886).

The spelling of 13831055 in words is "thirteen million, eight hundred thirty-one thousand, fifty-five".

Divisors: 1 5 7 35 395173 1975865 2766211 13831055