Base | Representation |
---|---|
bin | 11100111111101… |
… | …00001000100111 |
3 | 121221122220112100 |
4 | 32133310020213 |
5 | 444231033111 |
6 | 40045023143 |
7 | 6012226134 |
oct | 1637641047 |
9 | 557586470 |
10 | 243221031 |
11 | 115323619 |
12 | 69554ab3 |
13 | 3b50ac91 |
14 | 2443358b |
15 | 16545756 |
hex | e7f4227 |
243221031 has 6 divisors (see below), whose sum is σ = 351319280. Its totient is φ = 162147348.
The previous prime is 243221003. The next prime is 243221039. The reversal of 243221031 is 130122342.
It is not a de Polignac number, because 243221031 - 27 = 243220903 is a prime.
It is a super-2 number, since 2×2432210312 = 118312939841405922, 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 = 243220995 and 243221013.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (243221039) by changing a digit.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13512271 + ... + 13512288.
Almost surely, 2243221031 is an apocalyptic number.
243221031 is a deficient number, since it is larger than the sum of its proper divisors (108098249).
243221031 is a wasteful number, since it uses less digits than its factorization.
243221031 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 27024565 (or 27024562 counting only the distinct ones).
The product of its (nonzero) digits is 288, while the sum is 18.
The square root of 243221031 is about 15595.5452293275. The cubic root of 243221031 is about 624.2142924624.
Adding to 243221031 its reverse (130122342), we get a palindrome (373343373).
The spelling of 243221031 in words is "two hundred forty-three million, two hundred twenty-one thousand, thirty-one".
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