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13144555 = 52628911
BaseRepresentation
bin110010001001…
…000111101011
3220201210221101
4302021013223
511331111210
61145422231
7216504214
oct62110753
926653841
1013144555
117468776
12449a977
132952c58
141a6240b
151249a3a
hexc891eb

13144555 has 4 divisors (see below), whose sum is σ = 15773472. Its totient is φ = 10515640.

The previous prime is 13144543. The next prime is 13144577. The reversal of 13144555 is 55544131.

13144555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55544131 = 131424001.

It is not a de Polignac number, because 13144555 - 221 = 11047403 is a prime.

It is a super-2 number, since 2×131445552 = 345558652296050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1314451 + ... + 1314460.

It is an arithmetic number, because the mean of its divisors is an integer number (3943368).

Almost surely, 213144555 is an apocalyptic number.

13144555 is a deficient number, since it is larger than the sum of its proper divisors (2628917).

13144555 is an equidigital number, since it uses as much as digits as its factorization.

13144555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2628916.

The product of its digits is 6000, while the sum is 28.

The square root of 13144555 is about 3625.5420284421. The cubic root of 13144555 is about 236.0017894626.

Adding to 13144555 its reverse (55544131), we get a palindrome (68688686).

The spelling of 13144555 in words is "thirteen million, one hundred forty-four thousand, five hundred fifty-five".

Divisors: 1 5 2628911 13144555