82286521 has 2 divisors, whose sum is σ = 82286522. Its totient is φ = 82286520.

The previous prime is 82286497. The next prime is 82286537. The reversal of 82286521 is 12568228.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46717225 + 35569296 = 6835^2 + 5964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82286521 is a prime.

It is not a weakly prime, because it can be changed into another prime (82286551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41143260 + 41143261.

It is an arithmetic number, because the mean of its divisors is an integer number (41143261).

Almost surely, 2^82286521 is an apocalyptic number.

It is an amenable number.

82286521 is a deficient number, since it is larger than the sum of its proper divisors (1).

82286521 is an equidigital number, since it uses as much as digits as its factorization.

82286521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 34.

The square root of 82286521 is about 9071.1918180579. The cubic root of 82286521 is about 434.9535705940.

The spelling of 82286521 in words is "eighty-two million, two hundred eighty-six thousand, five hundred twenty-one".