82252809 has 6 divisors (see below), whose sum is σ = 118809626. Its totient is φ = 54835200.

The previous prime is 82252777. The next prime is 82252879. The reversal of 82252809 is 90825228.

It can be written as a sum of positive squares in only one way, i.e., 69806025 + 12446784 = 8355^2 + 3528^2 .

It is not a de Polignac number, because 82252809 - 2⁵ = 82252777 is a prime.

It is a super-3 number, since 3×82252809³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82252879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4569592 + ... + 4569609.

Almost surely, 2^82252809 is an apocalyptic number.

It is an amenable number.

82252809 is a deficient number, since it is larger than the sum of its proper divisors (36556817).

82252809 is a wasteful number, since it uses less digits than its factorization.

82252809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9139207 (or 9139204 counting only the distinct ones).

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

The square root of 82252809 is about 9069.3334374694. Note that the first 3 decimals coincide. The cubic root of 82252809 is about 434.8941637089.

The spelling of 82252809 in words is "eighty-two million, two hundred fifty-two thousand, eight hundred nine".