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8221286137 is a prime number
BaseRepresentation
bin1111010100000011…
…01101111011111001
3210012221210121102011
413222001231323321
5113314122124022
63435442405521
7410505531151
oct75201557371
923187717364
108221286137
113539779a59
1217153608a1
13a1034106c
1457dc2b761
15331b5b977
hex1ea06def9

8221286137 has 2 divisors, whose sum is σ = 8221286138. Its totient is φ = 8221286136.

The previous prime is 8221286131. The next prime is 8221286189. The reversal of 8221286137 is 7316821228.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7855099641 + 366186496 = 88629^2 + 19136^2 .

It is a cyclic number.

It is not a de Polignac number, because 8221286137 - 223 = 8212897529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8221286137.

It is not a weakly prime, because it can be changed into another prime (8221286131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4110643068 + 4110643069.

It is an arithmetic number, because the mean of its divisors is an integer number (4110643069).

Almost surely, 28221286137 is an apocalyptic number.

It is an amenable number.

8221286137 is a deficient number, since it is larger than the sum of its proper divisors (1).

8221286137 is an equidigital number, since it uses as much as digits as its factorization.

8221286137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 40.

The square root of 8221286137 is about 90671.3082347442. The cubic root of 8221286137 is about 2018.2730507701.

The spelling of 8221286137 in words is "eight billion, two hundred twenty-one million, two hundred eighty-six thousand, one hundred thirty-seven".