Search a number
-
+
80048581 is a prime number
BaseRepresentation
bin1001100010101…
…11000111000101
312120121220000021
410301113013011
5130443023311
611535415141
71661254534
oct461270705
9176556007
1080048581
1141204758
12229844b1
1313779532
14a8ba31b
157063171
hex4c571c5

80048581 has 2 divisors, whose sum is σ = 80048582. Its totient is φ = 80048580.

The previous prime is 80048569. The next prime is 80048587. The reversal of 80048581 is 18584008.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75168900 + 4879681 = 8670^2 + 2209^2 .

It is a cyclic number.

It is not a de Polignac number, because 80048581 - 221 = 77951429 is a prime.

It is a super-2 number, since 2×800485812 = 12815550640227122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80048587) 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 as a sum of consecutive naturals, namely, 40024290 + 40024291.

It is an arithmetic number, because the mean of its divisors is an integer number (40024291).

Almost surely, 280048581 is an apocalyptic number.

It is an amenable number.

80048581 is a deficient number, since it is larger than the sum of its proper divisors (1).

80048581 is an equidigital number, since it uses as much as digits as its factorization.

80048581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10240, while the sum is 34.

The square root of 80048581 is about 8946.9872582898. The cubic root of 80048581 is about 430.9741408501.

The spelling of 80048581 in words is "eighty million, forty-eight thousand, five hundred eighty-one".