Search a number
-
+
81327058 = 252178049
BaseRepresentation
bin1001101100011…
…11001111010010
312200000211202021
410312033033102
5131304431213
612023042054
72005161061
oct466171722
9180024667
1081327058
11419a824a
12232a032a
1313b06427
14ab301d8
157216d8d
hex4d8f3d2

81327058 has 8 divisors (see below), whose sum is σ = 122226300. Its totient is φ = 40584960.

The previous prime is 81327053. The next prime is 81327097. The reversal of 81327058 is 85072318.

It can be written as a sum of positive squares in 2 ways, for example, as 76160529 + 5166529 = 8727^2 + 2273^2 .

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

It is a super-2 number, since 2×813270582 = 13228180725870728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81327053) 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, 37983 + ... + 40066.

Almost surely, 281327058 is an apocalyptic number.

81327058 is a deficient number, since it is larger than the sum of its proper divisors (40899242).

81327058 is a wasteful number, since it uses less digits than its factorization.

81327058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78572.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 81327058 is about 9018.1515844435. The cubic root of 81327058 is about 433.2564338230.

The spelling of 81327058 in words is "eighty-one million, three hundred twenty-seven thousand, fifty-eight".

Divisors: 1 2 521 1042 78049 156098 40663529 81327058