Base | Representation |
---|---|
bin | 100001101101101… |
… | …0011100010110101 |
3 | 2220211121111202202 |
4 | 1003123103202311 |
5 | 4304043401123 |
6 | 304130114245 |
7 | 40014210524 |
oct | 10333234265 |
9 | 2824544682 |
10 | 1131231413 |
11 | 5306069a4 |
12 | 276a1b985 |
13 | 150497300 |
14 | aa34c4bb |
15 | 694a4a28 |
hex | 436d38b5 |
1131231413 has 12 divisors (see below), whose sum is σ = 1225906020. Its totient is φ = 1043392896.
The previous prime is 1131231389. The next prime is 1131231421. The reversal of 1131231413 is 3141321311.
It can be written as a sum of positive squares in 6 ways, for example, as 605996689 + 525234724 = 24617^2 + 22918^2 .
It is not a de Polignac number, because 1131231413 - 230 = 57489589 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1131231473) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 362303 + ... + 365411.
It is an arithmetic number, because the mean of its divisors is an integer number (102158835).
Almost surely, 21131231413 is an apocalyptic number.
1131231413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.
It is an amenable number.
1131231413 is a deficient number, since it is larger than the sum of its proper divisors (94674607).
1131231413 is a wasteful number, since it uses less digits than its factorization.
1131231413 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5288 (or 5275 counting only the distinct ones).
The product of its digits is 216, while the sum is 20.
The square root of 1131231413 is about 33633.7838043834. The cubic root of 1131231413 is about 1041.9586526648.
Adding to 1131231413 its reverse (3141321311), we get a palindrome (4272552724).
The spelling of 1131231413 in words is "one billion, one hundred thirty-one million, two hundred thirty-one thousand, four hundred thirteen".
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