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13255081 = 74740289
BaseRepresentation
bin110010100100…
…000110101001
3220221102112221
4302210012221
511343130311
61152034041
7220444360
oct62440651
926842487
1013255081
117533814
124532921
132991358
141a907d7
15126c671
hexca41a9

13255081 has 8 divisors (see below), whose sum is σ = 15471360. Its totient is φ = 11119488.

The previous prime is 13255069. The next prime is 13255091. The reversal of 13255081 is 18055231.

It is a happy number.

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 13255081 - 29 = 13254569 is a prime.

It is a super-2 number, since 2×132550812 = 351394344633122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13255031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19816 + ... + 20473.

It is an arithmetic number, because the mean of its divisors is an integer number (1933920).

Almost surely, 213255081 is an apocalyptic number.

It is an amenable number.

13255081 is a deficient number, since it is larger than the sum of its proper divisors (2216279).

13255081 is an equidigital number, since it uses as much as digits as its factorization.

13255081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40343.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 13255081 is about 3640.7528067695. The cubic root of 13255081 is about 236.6614178121.

The spelling of 13255081 in words is "thirteen million, two hundred fifty-five thousand, eighty-one".

Divisors: 1 7 47 329 40289 282023 1893583 13255081