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13080538 = 26540269
BaseRepresentation
bin110001111001…
…011111011010
3220121120010101
4301321133122
511322034123
61144210014
7216116452
oct61713732
926546111
1013080538
117424669
12446990a
13292ca83
141a46d62
151235aad
hexc797da

13080538 has 4 divisors (see below), whose sum is σ = 19620810. Its totient is φ = 6540268.

The previous prime is 13080527. The next prime is 13080539. The reversal of 13080538 is 83508031.

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

It can be written as a sum of positive squares in only one way, i.e., 12938409 + 142129 = 3597^2 + 377^2 .

It is a super-2 number, since 2×130805382 = 342200948738888, which contains 22 as substring.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (13080539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3270133 + ... + 3270136.

Almost surely, 213080538 is an apocalyptic number.

13080538 is a deficient number, since it is larger than the sum of its proper divisors (6540272).

13080538 is an equidigital number, since it uses as much as digits as its factorization.

13080538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6540271.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 13080538 is about 3616.7026419102. The cubic root of 13080538 is about 235.6180381726.

Adding to 13080538 its reverse (83508031), we get a palindrome (96588569).

The spelling of 13080538 in words is "thirteen million, eighty thousand, five hundred thirty-eight".

Divisors: 1 2 6540269 13080538