Base | Representation |
---|---|
bin | 11100111011011110… |
… | …11000000100000011 |
3 | 1111002101222000210211 |
4 | 32131233120010003 |
5 | 223302011003011 |
6 | 11045054334551 |
7 | 1056611150452 |
oct | 163557300403 |
9 | 44071860724 |
10 | 15531344131 |
11 | 66500477a6 |
12 | 30154ba457 |
13 | 1606956b74 |
14 | a74a18b99 |
15 | 60d7beb21 |
hex | 39dbd8103 |
15531344131 has 8 divisors (see below), whose sum is σ = 16036436864. Its totient is φ = 15026506560.
The previous prime is 15531344119. The next prime is 15531344161. The reversal of 15531344131 is 13144313551.
15531344131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
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 15531344131 - 221 = 15529246979 is a prime.
It is a super-2 number, since 2×155313441312 (a number of 21 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (31).
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 15531344093 and 15531344102.
It is not an unprimeable number, because it can be changed into a prime (15531344161) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64021 + ... + 187513.
It is an arithmetic number, because the mean of its divisors is an integer number (2004554608).
Almost surely, 215531344131 is an apocalyptic number.
15531344131 is a deficient number, since it is larger than the sum of its proper divisors (505092733).
15531344131 is a wasteful number, since it uses less digits than its factorization.
15531344131 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 127581.
The product of its digits is 10800, while the sum is 31.
Adding to 15531344131 its reverse (13144313551), we get a palindrome (28675657682).
The spelling of 15531344131 in words is "fifteen billion, five hundred thirty-one million, three hundred forty-four thousand, one hundred thirty-one".
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