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80271481 = 4117311317
BaseRepresentation
bin1001100100011…
…01100001111001
312121001012202211
410302031201321
5131022141411
611544255121
71663203433
oct462154171
9177035684
1080271481
1141347174
1222a714a1
1313826b24
14a937653
1570a9221
hex4c8d879

80271481 has 8 divisors (see below), whose sum is σ = 82711944. Its totient is φ = 77854080.

The previous prime is 80271479. The next prime is 80271517. The reversal of 80271481 is 18417208.

It can be written as a sum of positive squares in 4 ways, for example, as 30074256 + 50197225 = 5484^2 + 7085^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80271481 - 21 = 80271479 is a prime.

It is a super-2 number, since 2×802714812 = 12887021323866722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80271421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1435 + ... + 12751.

It is an arithmetic number, because the mean of its divisors is an integer number (10338993).

Almost surely, 280271481 is an apocalyptic number.

It is an amenable number.

80271481 is a deficient number, since it is larger than the sum of its proper divisors (2440463).

80271481 is a wasteful number, since it uses less digits than its factorization.

80271481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11531.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 80271481 is about 8959.4353058661. The cubic root of 80271481 is about 431.3737944399.

Adding to 80271481 its reverse (18417208), we get a palindrome (98688689).

The spelling of 80271481 in words is "eighty million, two hundred seventy-one thousand, four hundred eighty-one".

Divisors: 1 41 173 7093 11317 463997 1957841 80271481