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71585005 = 514317001
BaseRepresentation
bin1000100010001…
…00110011101101
311222200220011111
410101010303231
5121311210010
611034152021
71526314432
oct421046355
9158626144
1071585005
1137453968
121bb82611
1311aa50bb
149715b89
15644058a
hex4444ced

71585005 has 4 divisors (see below), whose sum is σ = 85902012. Its totient is φ = 57268000.

The previous prime is 71584889. The next prime is 71585053. The reversal of 71585005 is 50058517.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8398404 + 63186601 = 2898^2 + 7949^2 .

It is not a de Polignac number, because 71585005 - 211 = 71582957 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7158496 + ... + 7158505.

It is an arithmetic number, because the mean of its divisors is an integer number (21475503).

Almost surely, 271585005 is an apocalyptic number.

It is an amenable number.

71585005 is a deficient number, since it is larger than the sum of its proper divisors (14317007).

71585005 is a wasteful number, since it uses less digits than its factorization.

71585005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14317006.

The product of its (nonzero) digits is 7000, while the sum is 31.

The square root of 71585005 is about 8460.7922205902. The cubic root of 71585005 is about 415.2159421963.

The spelling of 71585005 in words is "seventy-one million, five hundred eighty-five thousand, five".

Divisors: 1 5 14317001 71585005