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13052981 = 19472311
BaseRepresentation
bin110001110010…
…110000110101
3220120011022202
4301302300311
511320143411
61143434245
7215643224
oct61626065
926504282
1013052981
117405997
124455985
132920376
141a3acbb
15122c83b
hexc72c35

13052981 has 12 divisors (see below), whose sum is σ = 14083680. Its totient is φ = 12063960.

The previous prime is 13052947. The next prime is 13052989. The reversal of 13052981 is 18925031.

13052981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13052981 - 26 = 13052917 is a prime.

It is a super-2 number, since 2×130529812 = 340760625972722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13052989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41816 + ... + 42126.

It is an arithmetic number, because the mean of its divisors is an integer number (1173640).

Almost surely, 213052981 is an apocalyptic number.

It is an amenable number.

13052981 is a deficient number, since it is larger than the sum of its proper divisors (1030699).

13052981 is an equidigital number, since it uses as much as digits as its factorization.

13052981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 13052981 is about 3612.8909477038. The cubic root of 13052981 is about 235.4524616188.

The spelling of 13052981 in words is "thirteen million, fifty-two thousand, nine hundred eighty-one".

Divisors: 1 19 47 311 893 2209 5909 14617 41971 277723 686999 13052981