Base | Representation |
---|---|
bin | 111011101111… |
… | …0110101010110 |
3 | 2011221021220222 |
4 | 1313132311112 |
5 | 31004241210 |
6 | 3035154342 |
7 | 530141060 |
oct | 167366526 |
9 | 64837828 |
10 | 31321430 |
11 | 16753288 |
12 | a5a59b2 |
13 | 66485ba |
14 | 4234730 |
15 | 2b3a655 |
hex | 1dded56 |
31321430 has 16 divisors (see below), whose sum is σ = 64432800. Its totient is φ = 10738752.
The previous prime is 31321427. The next prime is 31321441. The reversal of 31321430 is 3412313.
It is a happy number.
It is a Curzon number.
It is a junction number, because it is equal to n+sod(n) for n = 31321399 and 31321408.
It is a congruent number.
It is an unprimeable number.
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, 223655 + ... + 223794.
It is an arithmetic number, because the mean of its divisors is an integer number (4027050).
Almost surely, 231321430 is an apocalyptic number.
31321430 is an abundant number, since it is smaller than the sum of its proper divisors (33111370).
31321430 is a wasteful number, since it uses less digits than its factorization.
31321430 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 447463.
The product of its (nonzero) digits is 216, while the sum is 17.
The square root of 31321430 is about 5596.5551904721. Note that the first 3 decimals coincide. The cubic root of 31321430 is about 315.2200696141.
Adding to 31321430 its reverse (3412313), we get a palindrome (34733743).
The spelling of 31321430 in words is "thirty-one million, three hundred twenty-one thousand, four hundred thirty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.065 sec. • engine limits •