Base | Representation |
---|---|
bin | 10111001011000000… |
… | …11110101001101011 |
3 | 1012002222212101101112 |
4 | 23211200132221223 |
5 | 200434222244321 |
6 | 5414241340535 |
7 | 620166630515 |
oct | 134540365153 |
9 | 35088771345 |
10 | 12440431211 |
11 | 530433210a |
12 | 24b233774b |
13 | 1233491000 |
14 | 860308bb5 |
15 | 4cc26da5b |
hex | 2e581ea6b |
12440431211 has 32 divisors (see below), whose sum is σ = 13775287680. Its totient is φ = 11231875200.
The previous prime is 12440431189. The next prime is 12440431219. The reversal of 12440431211 is 11213404421.
It is a de Polignac number, because none of the positive numbers 2k-12440431211 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (12440431219) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26985521 + ... + 26985981.
It is an arithmetic number, because the mean of its divisors is an integer number (430477740).
Almost surely, 212440431211 is an apocalyptic number.
12440431211 is a deficient number, since it is larger than the sum of its proper divisors (1334856469).
12440431211 is an equidigital number, since it uses as much as digits as its factorization.
12440431211 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 744 (or 718 counting only the distinct ones).
The product of its (nonzero) digits is 768, while the sum is 23.
Adding to 12440431211 its reverse (11213404421), we get a palindrome (23653835632).
The spelling of 12440431211 in words is "twelve billion, four hundred forty million, four hundred thirty-one thousand, two hundred eleven".
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