82275149981 has 2 divisors, whose sum is σ = 82275149982. Its totient is φ = 82275149980.

The previous prime is 82275149947. The next prime is 82275149989. The reversal of 82275149981 is 18994157228.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81301397956 + 973752025 = 285134^2 + 31205^2 .

It is a cyclic number.

It is not a de Polignac number, because 82275149981 - 2¹⁸ = 82274887837 is a prime.

It is a super-2 number, since 2×82275149981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82275149989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41137574990 + 41137574991.

It is an arithmetic number, because the mean of its divisors is an integer number (41137574991).

Almost surely, 2^82275149981 is an apocalyptic number.

It is an amenable number.

82275149981 is a deficient number, since it is larger than the sum of its proper divisors (1).

82275149981 is an equidigital number, since it uses as much as digits as its factorization.

82275149981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 56.

The spelling of 82275149981 in words is "eighty-two billion, two hundred seventy-five million, one hundred forty-nine thousand, nine hundred eighty-one".