Base | Representation |
---|---|
bin | 11100010101110110… |
… | …000001011000001111 |
3 | 2220112210202212200122 |
4 | 130111312001120033 |
5 | 444310400112111 |
6 | 21551355215155 |
7 | 2125054251143 |
oct | 342566013017 |
9 | 86483685618 |
10 | 30431254031 |
11 | 119a6716622 |
12 | 5a934474bb |
13 | 2b3c82a3b9 |
14 | 1689827223 |
15 | bd1912cdb |
hex | 715d8160f |
30431254031 has 8 divisors (see below), whose sum is σ = 32073617280. Its totient is φ = 28792962648.
The previous prime is 30431254003. The next prime is 30431254109. The reversal of 30431254031 is 13045213403.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 30431254031 - 226 = 30364145167 is a prime.
It is a super-2 number, since 2×304312540312 (a number of 22 digits) contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (30431254331) 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 7 ways as a sum of consecutive naturals, for example, 1002611 + ... + 1032516.
It is an arithmetic number, because the mean of its divisors is an integer number (4009202160).
Almost surely, 230431254031 is an apocalyptic number.
30431254031 is a deficient number, since it is larger than the sum of its proper divisors (1642363249).
30431254031 is a wasteful number, since it uses less digits than its factorization.
30431254031 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2035933.
The product of its (nonzero) digits is 4320, while the sum is 26.
Adding to 30431254031 its reverse (13045213403), we get a palindrome (43476467434).
The spelling of 30431254031 in words is "thirty billion, four hundred thirty-one million, two hundred fifty-four thousand, thirty-one".
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