Base | Representation |
---|---|
bin | 11010010010110… |
… | …10010001101011 |
3 | 120101001011011100 |
4 | 31021122101223 |
5 | 422431230411 |
6 | 33515332443 |
7 | 5315551233 |
oct | 1511322153 |
9 | 511034140 |
10 | 220570731 |
11 | 103563067 |
12 | 61a51123 |
13 | 3690a434 |
14 | 21418cc3 |
15 | 1456e456 |
hex | d25a46b |
220570731 has 12 divisors (see below), whose sum is σ = 318889480. Its totient is φ = 146914560.
The previous prime is 220570729. The next prime is 220570793. The reversal of 220570731 is 137075022.
220570731 is a `hidden beast` number, since 2 + 20 + 570 + 73 + 1 = 666.
220570731 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 220570731 - 21 = 220570729 is a prime.
It is a super-2 number, since 2×2205707312 = 97302894747748722, which contains 22 as substring.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 220570695 and 220570704.
It is not an unprimeable number, because it can be changed into a prime (220570331) 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, 75 + ... + 21003.
Almost surely, 2220570731 is an apocalyptic number.
220570731 is a deficient number, since it is larger than the sum of its proper divisors (98318749).
220570731 is a wasteful number, since it uses less digits than its factorization.
220570731 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 22106 (or 22103 counting only the distinct ones).
The product of its (nonzero) digits is 2940, while the sum is 27.
The square root of 220570731 is about 14851.6238506097. The cubic root of 220570731 is about 604.2026524572.
The spelling of 220570731 in words is "two hundred twenty million, five hundred seventy thousand, seven hundred thirty-one".
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