82840225 has 36 divisors (see below), whose sum is σ = 114998716. Its totient is φ = 58803840.

The previous prime is 82840223. The next prime is 82840237. The reversal of 82840225 is 52204828.

It can be written as a sum of positive squares in 6 ways, for example, as 992016 + 81848209 = 996^2 + 9047^2 .

It is not a de Polignac number, because 82840225 - 2¹ = 82840223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82840223) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 998034 + ... + 998116.

Almost surely, 2^82840225 is an apocalyptic number.

It is an amenable number.

82840225 is a deficient number, since it is larger than the sum of its proper divisors (32158491).

82840225 is a wasteful number, since it uses less digits than its factorization.

82840225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 31.

The square root of 82840225 is about 9101.6605627764. The cubic root of 82840225 is about 435.9269878162.

The spelling of 82840225 in words is "eighty-two million, eight hundred forty thousand, two hundred twenty-five".