Base | Representation |
---|---|
bin | 1111101010111… |
… | …01111111101111 |
3 | 100011100201010001 |
4 | 13311131333233 |
5 | 232123111012 |
6 | 21013325131 |
7 | 3154236403 |
oct | 765357757 |
9 | 304321101 |
10 | 131457007 |
11 | 68227660 |
12 | 380367a7 |
13 | 21308a16 |
14 | 1365d103 |
15 | b81a357 |
hex | 7d5dfef |
131457007 has 4 divisors (see below), whose sum is σ = 143407656. Its totient is φ = 119506360.
The previous prime is 131456993. The next prime is 131457043. The reversal of 131457007 is 700754131.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 131457007 - 27 = 131456879 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 (131457607) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5975308 + ... + 5975329.
It is an arithmetic number, because the mean of its divisors is an integer number (35851914).
Almost surely, 2131457007 is an apocalyptic number.
131457007 is a deficient number, since it is larger than the sum of its proper divisors (11950649).
131457007 is a wasteful number, since it uses less digits than its factorization.
131457007 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 11950648.
The product of its (nonzero) digits is 2940, while the sum is 28.
The square root of 131457007 is about 11465.4702040518. The cubic root of 131457007 is about 508.4652141443.
The spelling of 131457007 in words is "one hundred thirty-one million, four hundred fifty-seven thousand, seven".
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