82171091053 has 2 divisors, whose sum is σ = 82171091054. Its totient is φ = 82171091052.

The previous prime is 82171091003. The next prime is 82171091083. The reversal of 82171091053 is 35019017128.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41200068484 + 40971022569 = 202978^2 + 202413^2 .

It is a cyclic number.

It is not a de Polignac number, because 82171091053 - 2²⁹ = 81634220141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82171091003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41085545526 + 41085545527.

It is an arithmetic number, because the mean of its divisors is an integer number (41085545527).

Almost surely, 2^82171091053 is an apocalyptic number.

It is an amenable number.

82171091053 is a deficient number, since it is larger than the sum of its proper divisors (1).

82171091053 is an equidigital number, since it uses as much as digits as its factorization.

82171091053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 37.

The spelling of 82171091053 in words is "eighty-two billion, one hundred seventy-one million, ninety-one thousand, fifty-three".