| Base | Representation |
|---|---|
| bin | 111100011111… |
| … | …0010000001101 |
| 3 | 2012200011001111 |
| 4 | 1320332100031 |
| 5 | 31104243034 |
| 6 | 3051412021 |
| 7 | 533356411 |
| oct | 170762015 |
| 9 | 65604044 |
| 10 | 31712269 |
| 11 | 1699a996 |
| 12 | a754011 |
| 13 | 6754474 |
| 14 | 42d6d41 |
| 15 | 2bb6364 |
| hex | 1e3e40d |
31712269 has 4 divisors (see below), whose sum is σ = 31820796. Its totient is φ = 31603744.
The previous prime is 31712251. The next prime is 31712279. The reversal of 31712269 is 96221713.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96221713 = 7 ⋅13745959.
It can be written as a sum of positive squares in 2 ways, for example, as 27175369 + 4536900 = 5213^2 + 2130^2 .
It is a cyclic number.
It is not a de Polignac number, because 31712269 - 25 = 31712237 is a prime.
It is a super-2 number, since 2×317122692 = 2011336010256722, which contains 22 as substring.
It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 31712269.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (31712249) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53824 + ... + 54409.
It is an arithmetic number, because the mean of its divisors is an integer number (7955199).
Almost surely, 231712269 is an apocalyptic number.
It is an amenable number.
31712269 is a deficient number, since it is larger than the sum of its proper divisors (108527).
31712269 is a wasteful number, since it uses less digits than its factorization.
31712269 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 108526.
The product of its digits is 4536, while the sum is 31.
The square root of 31712269 is about 5631.3647546576. The cubic root of 31712269 is about 316.5257930491.
The spelling of 31712269 in words is "thirty-one million, seven hundred twelve thousand, two hundred sixty-nine".
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