85405225 has 12 divisors (see below), whose sum is σ = 106024960. Its totient is φ = 68245200.

The previous prime is 85405223. The next prime is 85405237. The reversal of 85405225 is 52250458.

It is not a de Polignac number, because 85405225 - 2¹ = 85405223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85405223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30640 + ... + 33310.

Almost surely, 2^85405225 is an apocalyptic number.

It is an amenable number.

85405225 is a deficient number, since it is larger than the sum of its proper divisors (20619735).

85405225 is a wasteful number, since it uses less digits than its factorization.

85405225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3960 (or 3955 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 31.

The square root of 85405225 is about 9241.4947384068. The cubic root of 85405225 is about 440.3805677804.

The spelling of 85405225 in words is "eighty-five million, four hundred five thousand, two hundred twenty-five".