Base | Representation |
---|---|
bin | 110001101001… |
… | …011111111101 |
3 | 220111020021102 |
4 | 301221133331 |
5 | 11312440122 |
6 | 1142542445 |
7 | 215424500 |
oct | 61513775 |
9 | 26436242 |
10 | 13015037 |
11 | 738a432 |
12 | 4437a25 |
13 | 2909009 |
14 | 1a2b137 |
15 | 1221492 |
hex | c697fd |
13015037 has 6 divisors (see below), whose sum is σ = 15139998. Its totient is φ = 11155704.
The previous prime is 13015007. The next prime is 13015043. The reversal of 13015037 is 73051031.
It is a happy number.
13015037 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It can be written as a sum of positive squares in only one way, i.e., 10686361 + 2328676 = 3269^2 + 1526^2 .
It is not a de Polignac number, because 13015037 - 26 = 13014973 is a prime.
It is a super-2 number, since 2×130150372 = 338782376222738, 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 (13015007) by changing a digit.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 132758 + ... + 132855.
It is an arithmetic number, because the mean of its divisors is an integer number (2523333).
Almost surely, 213015037 is an apocalyptic number.
It is an amenable number.
13015037 is a deficient number, since it is larger than the sum of its proper divisors (2124961).
13015037 is an equidigital number, since it uses as much as digits as its factorization.
13015037 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 265627 (or 265620 counting only the distinct ones).
The product of its (nonzero) digits is 315, while the sum is 20.
The square root of 13015037 is about 3607.6359295250. The cubic root of 13015037 is about 235.2240928645.
Adding to 13015037 its reverse (73051031), we get a palindrome (86066068).
The spelling of 13015037 in words is "thirteen million, fifteen thousand, thirty-seven".
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