Base | Representation |
---|---|
bin | 10100011011111… |
… | …01010001110111 |
3 | 102221120121011110 |
4 | 22031331101313 |
5 | 322341243111 |
6 | 25002210103 |
7 | 4151065632 |
oct | 1215752167 |
9 | 387517143 |
10 | 171431031 |
11 | 8884a742 |
12 | 494b3933 |
13 | 296937a5 |
14 | 18aa6c19 |
15 | 100b45a6 |
hex | a37d477 |
171431031 has 4 divisors (see below), whose sum is σ = 228574712. Its totient is φ = 114287352.
The previous prime is 171430993. The next prime is 171431059. The reversal of 171431031 is 130134171.
It is a semiprime because it is the product of two primes.
It is not a de Polignac number, because 171431031 - 217 = 171299959 is a prime.
It is a super-2 number, since 2×1714310312 = 58777196779445922, 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 = 171430989 and 171431007.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (171431131) 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 3 ways as a sum of consecutive naturals, for example, 28571836 + ... + 28571841.
It is an arithmetic number, because the mean of its divisors is an integer number (57143678).
Almost surely, 2171431031 is an apocalyptic number.
171431031 is a deficient number, since it is larger than the sum of its proper divisors (57143681).
171431031 is an equidigital number, since it uses as much as digits as its factorization.
171431031 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 57143680.
The product of its (nonzero) digits is 252, while the sum is 21.
The square root of 171431031 is about 13093.1673402580. The cubic root of 171431031 is about 555.5158810171.
The spelling of 171431031 in words is "one hundred seventy-one million, four hundred thirty-one thousand, thirty-one".
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