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71315320 = 2351782883
BaseRepresentation
bin1000100000000…
…10111101111000
311222012012020011
410100002331320
5121224042240
611024311304
71524112246
oct420027570
9158165204
1071315320
113728a28a
121ba72534
1311a0c41b
149685796
1563da6ea
hex4402f78

71315320 has 16 divisors (see below), whose sum is σ = 160459560. Its totient is φ = 28526112.

The previous prime is 71315297. The next prime is 71315327. The reversal of 71315320 is 2351317.

It is a junction number, because it is equal to n+sod(n) for n = 71315291 and 71315300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71315327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 891402 + ... + 891481.

Almost surely, 271315320 is an apocalyptic number.

It is an amenable number.

71315320 is an abundant number, since it is smaller than the sum of its proper divisors (89144240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71315320 is a wasteful number, since it uses less digits than its factorization.

71315320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782894 (or 1782890 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 71315320 is about 8444.8398445441. The cubic root of 71315320 is about 414.6938662601.

Adding to 71315320 its reverse (2351317), we get a palindrome (73666637).

The spelling of 71315320 in words is "seventy-one million, three hundred fifteen thousand, three hundred twenty".

Divisors: 1 2 4 5 8 10 20 40 1782883 3565766 7131532 8914415 14263064 17828830 35657660 71315320