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217251872053 is a prime number
BaseRepresentation
bin1100101001010100111…
…0000111110100110101
3202202202122201120220121
43022111032013310311
512024412434401203
6243445405331541
721460463305036
oct3122516076465
9682678646817
10217251872053
1184155021aa7
1236131266bb1
131764355c0a8
14a72d406a8d
1559b7d000bd
hex3295387d35

217251872053 has 2 divisors, whose sum is σ = 217251872054. Its totient is φ = 217251872052.

The previous prime is 217251872023. The next prime is 217251872059. The reversal of 217251872053 is 350278152712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211165063729 + 6086808324 = 459527^2 + 78018^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-217251872053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217251872059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108625936026 + 108625936027.

It is an arithmetic number, because the mean of its divisors is an integer number (108625936027).

Almost surely, 2217251872053 is an apocalyptic number.

It is an amenable number.

217251872053 is a deficient number, since it is larger than the sum of its proper divisors (1).

217251872053 is an equidigital number, since it uses as much as digits as its factorization.

217251872053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 235200, while the sum is 43.

The spelling of 217251872053 in words is "two hundred seventeen billion, two hundred fifty-one million, eight hundred seventy-two thousand, fifty-three".