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71216365 = 5112532221
BaseRepresentation
bin1000011111010…
…10110011101101
311222000011111011
410033222303231
5121212410430
611022225221
71523220613
oct417526355
9158004434
1071216365
1137221a00
121ba25211
13119a637c
14965b6b3
1563bb22a
hex43eaced

71216365 has 24 divisors (see below), whose sum is σ = 95750424. Its totient is φ = 50793600.

The previous prime is 71216357. The next prime is 71216371. The reversal of 71216365 is 56361217.

It can be written as a sum of positive squares in 4 ways, for example, as 18028516 + 53187849 = 4246^2 + 7293^2 .

It is not a de Polignac number, because 71216365 - 23 = 71216357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30955 + ... + 33175.

It is an arithmetic number, because the mean of its divisors is an integer number (3989601).

Almost surely, 271216365 is an apocalyptic number.

It is an amenable number.

71216365 is a deficient number, since it is larger than the sum of its proper divisors (24534059).

71216365 is a wasteful number, since it uses less digits than its factorization.

71216365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2301 (or 2290 counting only the distinct ones).

The product of its digits is 7560, while the sum is 31.

The square root of 71216365 is about 8438.9789074271. The cubic root of 71216365 is about 414.5019718850.

The spelling of 71216365 in words is "seventy-one million, two hundred sixteen thousand, three hundred sixty-five".

Divisors: 1 5 11 53 55 121 265 583 605 2221 2915 6413 11105 24431 32065 117713 122155 268741 588565 1294843 1343705 6474215 14243273 71216365