82517081 has 2 divisors, whose sum is σ = 82517082. Its totient is φ = 82517080.

The previous prime is 82517069. The next prime is 82517087. The reversal of 82517081 is 18071528.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48177481 + 34339600 = 6941^2 + 5860^2 .

It is a cyclic number.

It is not a de Polignac number, because 82517081 - 2¹⁴ = 82500697 is a prime.

It is a super-2 number, since 2×82517081² = 13618137313521122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82517087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41258540 + 41258541.

It is an arithmetic number, because the mean of its divisors is an integer number (41258541).

Almost surely, 2^82517081 is an apocalyptic number.

It is an amenable number.

82517081 is a deficient number, since it is larger than the sum of its proper divisors (1).

82517081 is an equidigital number, since it uses as much as digits as its factorization.

82517081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 82517081 is about 9083.8912917318. The cubic root of 82517081 is about 435.3594263692.

The spelling of 82517081 in words is "eighty-two million, five hundred seventeen thousand, eighty-one".