Base | Representation |
---|---|
bin | 1111101000000… |
… | …10110010100111 |
3 | 100010122201122220 |
4 | 13310002302213 |
5 | 232024132211 |
6 | 21001323423 |
7 | 3151122303 |
oct | 764026247 |
9 | 303581586 |
10 | 131083431 |
11 | 67aa1a16 |
12 | 37a96573 |
13 | 2120797b |
14 | 135a2d03 |
15 | b794806 |
hex | 7d02ca7 |
131083431 has 16 divisors (see below), whose sum is σ = 176947200. Its totient is φ = 86311008.
The previous prime is 131083429. The next prime is 131083441. The reversal of 131083431 is 134380131.
It is not a de Polignac number, because 131083431 - 21 = 131083429 is a prime.
It is a super-2 number, since 2×1310834312 = 34365731765463522, which contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (131083411) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101850 + ... + 103128.
It is an arithmetic number, because the mean of its divisors is an integer number (11059200).
Almost surely, 2131083431 is an apocalyptic number.
131083431 is a deficient number, since it is larger than the sum of its proper divisors (45863769).
131083431 is a wasteful number, since it uses less digits than its factorization.
131083431 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1678.
The product of its (nonzero) digits is 864, while the sum is 24.
The square root of 131083431 is about 11449.1672622947. The cubic root of 131083431 is about 507.9831031125.
The spelling of 131083431 in words is "one hundred thirty-one million, eighty-three thousand, four hundred thirty-one".
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