Base | Representation |
---|---|
bin | 11010100101110100… |
… | …000010010011010011 |
3 | 2201200211000220011002 |
4 | 122211310002103103 |
5 | 431433212412311 |
6 | 21041053412215 |
7 | 2030352215051 |
oct | 324564022323 |
9 | 81624026132 |
10 | 28551685331 |
11 | 11121755864 |
12 | 5649a9a06b |
13 | 29002cb380 |
14 | 154bd5b1d1 |
15 | b218dd93b |
hex | 6a5d024d3 |
28551685331 has 4 divisors (see below), whose sum is σ = 30747968832. Its totient is φ = 26355401832.
The previous prime is 28551685297. The next prime is 28551685343. The reversal of 28551685331 is 13358615582.
It is a happy number.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-28551685331 is a prime.
It is a super-2 number, since 2×285516853312 (a number of 22 digits) contains 22 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (28551685231) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1098141731 + ... + 1098141756.
It is an arithmetic number, because the mean of its divisors is an integer number (7686992208).
Almost surely, 228551685331 is an apocalyptic number.
28551685331 is a deficient number, since it is larger than the sum of its proper divisors (2196283501).
28551685331 is a wasteful number, since it uses less digits than its factorization.
28551685331 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2196283500.
The product of its digits is 864000, while the sum is 47.
The spelling of 28551685331 in words is "twenty-eight billion, five hundred fifty-one million, six hundred eighty-five thousand, three hundred thirty-one".
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