Search a number
-
+
84215081 is a prime number
BaseRepresentation
bin1010000010100…
…00010100101001
312212110120101002
411001100110221
5133024340311
612205004345
72041550006
oct501202451
9185416332
1084215081
11435a0045
12242536b5
13145a7b12
14b2828ad
1575d793b
hex5050529

84215081 has 2 divisors, whose sum is σ = 84215082. Its totient is φ = 84215080.

The previous prime is 84215069. The next prime is 84215111. The reversal of 84215081 is 18051248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73685056 + 10530025 = 8584^2 + 3245^2 .

It is a cyclic number.

It is not a de Polignac number, because 84215081 - 218 = 83952937 is a prime.

It is a super-2 number, since 2×842150812 = 14184359735673122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84212081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42107540 + 42107541.

It is an arithmetic number, because the mean of its divisors is an integer number (42107541).

Almost surely, 284215081 is an apocalyptic number.

It is an amenable number.

84215081 is a deficient number, since it is larger than the sum of its proper divisors (1).

84215081 is an equidigital number, since it uses as much as digits as its factorization.

84215081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 84215081 is about 9176.8775190693. The cubic root of 84215081 is about 438.3253856340.

The spelling of 84215081 in words is "eighty-four million, two hundred fifteen thousand, eighty-one".