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13103231 = 41319591
BaseRepresentation
bin110001111111…
…000001111111
3220122201020212
4301333001333
511323300411
61144503035
7216242561
oct61770177
926581225
1013103231
11743a719
12447aa7b
13293a1bb
141a51331
15123c68b
hexc7f07f

13103231 has 4 divisors (see below), whose sum is σ = 13422864. Its totient is φ = 12783600.

The previous prime is 13103219. The next prime is 13103239. The reversal of 13103231 is 13230131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13103231 - 210 = 13102207 is a prime.

It is a super-2 number, since 2×131032312 = 343389325278722, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13103239) 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, 159755 + ... + 159836.

It is an arithmetic number, because the mean of its divisors is an integer number (3355716).

Almost surely, 213103231 is an apocalyptic number.

13103231 is a deficient number, since it is larger than the sum of its proper divisors (319633).

13103231 is an equidigital number, since it uses as much as digits as its factorization.

13103231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319632.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 13103231 is about 3619.8385323105. The cubic root of 13103231 is about 235.7542148108.

Adding to 13103231 its reverse (13230131), we get a palindrome (26333362).

The spelling of 13103231 in words is "thirteen million, one hundred three thousand, two hundred thirty-one".

Divisors: 1 41 319591 13103231