Base | Representation |
---|---|
bin | 1111101001000… |
… | …10011101001010 |
3 | 100010220022120120 |
4 | 13310202131022 |
5 | 232042310010 |
6 | 21004204110 |
7 | 3152202366 |
oct | 764423512 |
9 | 303808516 |
10 | 131213130 |
11 | 68080404 |
12 | 37b39636 |
13 | 21251a09 |
14 | 135d82a6 |
15 | b7bce70 |
hex | 7d2274a |
131213130 has 16 divisors (see below), whose sum is σ = 314911584. Its totient is φ = 34990160.
The previous prime is 131213129. The next prime is 131213153. The reversal of 131213130 is 31312131.
It is a Harshad number since it is a multiple of its sum of digits (15).
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2186856 + ... + 2186915.
It is an arithmetic number, because the mean of its divisors is an integer number (19681974).
Almost surely, 2131213130 is an apocalyptic number.
131213130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
131213130 is an abundant number, since it is smaller than the sum of its proper divisors (183698454).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
131213130 is a wasteful number, since it uses less digits than its factorization.
131213130 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4373781.
The product of its (nonzero) digits is 54, while the sum is 15.
The square root of 131213130 is about 11454.8299856436. The cubic root of 131213130 is about 508.1505872414.
Adding to 131213130 its reverse (31312131), we get a palindrome (162525261).
Subtracting from 131213130 its reverse (31312131), we obtain a palindrome (99900999).
The spelling of 131213130 in words is "one hundred thirty-one million, two hundred thirteen thousand, one hundred thirty".
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