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13508053 = 131039081
BaseRepresentation
bin110011100001…
…110111010101
3221102021120021
4303201313111
511424224203
61201305141
7222550036
oct63416725
927367507
1013508053
117696889
1246351b1
132a4c540
141b18a8d
1512bc5bd
hexce1dd5

13508053 has 4 divisors (see below), whose sum is σ = 14547148. Its totient is φ = 12468960.

The previous prime is 13508051. The next prime is 13508087. The reversal of 13508053 is 35080531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35080531 = 83422657.

It can be written as a sum of positive squares in 2 ways, for example, as 677329 + 12830724 = 823^2 + 3582^2 .

It is a cyclic number.

It is not a de Polignac number, because 13508053 - 21 = 13508051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13508051) 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, 519528 + ... + 519553.

It is an arithmetic number, because the mean of its divisors is an integer number (3636787).

Almost surely, 213508053 is an apocalyptic number.

13508053 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

13508053 is a deficient number, since it is larger than the sum of its proper divisors (1039095).

13508053 is a wasteful number, since it uses less digits than its factorization.

13508053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039094.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 13508053 is about 3675.3303252905. The cubic root of 13508053 is about 238.1574940903.

Adding to 13508053 its reverse (35080531), we get a palindrome (48588584).

The spelling of 13508053 in words is "thirteen million, five hundred eight thousand, fifty-three".

Divisors: 1 13 1039081 13508053