Base | Representation |
---|---|
bin | 1010011000111… |
… | …01000110011111 |
3 | 20001222201201002 |
4 | 11030131012133 |
5 | 134302313012 |
6 | 12351540515 |
7 | 2105525366 |
oct | 514350637 |
9 | 201881632 |
10 | 87151007 |
11 | 45215929 |
12 | 2522a73b |
13 | 15095258 |
14 | b8087dd |
15 | 79b77c2 |
hex | 531d19f |
87151007 has 4 divisors (see below), whose sum is σ = 87177480. Its totient is φ = 87124536.
The previous prime is 87150997. The next prime is 87151037. The reversal of 87151007 is 70015178.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70015178 = 2 ⋅35007589.
It is a cyclic number.
It is not a de Polignac number, because 87151007 - 212 = 87146911 is a prime.
It is a super-2 number, since 2×871510072 = 15190596042228098, which contains 22 as substring.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (87151037) 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, 7457 + ... + 15162.
It is an arithmetic number, because the mean of its divisors is an integer number (21794370).
Almost surely, 287151007 is an apocalyptic number.
87151007 is a deficient number, since it is larger than the sum of its proper divisors (26473).
87151007 is a wasteful number, since it uses less digits than its factorization.
87151007 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 26472.
The product of its (nonzero) digits is 1960, while the sum is 29.
The square root of 87151007 is about 9335.4703684389. The cubic root of 87151007 is about 443.3609814982.
The spelling of 87151007 in words is "eighty-seven million, one hundred fifty-one thousand, seven".
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