82285209 has 12 divisors (see below), whose sum is σ = 122955300. Its totient is φ = 52965024.

The previous prime is 82285207. The next prime is 82285211. The reversal of 82285209 is 90258228.

It is an interprime number because it is at equal distance from previous prime (82285207) and next prime (82285211).

It can be written as a sum of positive squares in 2 ways, for example, as 57335184 + 24950025 = 7572^2 + 4995^2 .

It is not a de Polignac number, because 82285209 - 2¹ = 82285207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82285207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157374 + ... + 157895.

It is an arithmetic number, because the mean of its divisors is an integer number (10246275).

Almost surely, 2^82285209 is an apocalyptic number.

It is an amenable number.

82285209 is a deficient number, since it is larger than the sum of its proper divisors (40670091).

82285209 is a wasteful number, since it uses less digits than its factorization.

82285209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315304 (or 315301 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 82285209 is about 9071.1195009216. The cubic root of 82285209 is about 434.9512589067.

The spelling of 82285209 in words is "eighty-two million, two hundred eighty-five thousand, two hundred nine".