85525825 has 54 divisors (see below), whose sum is σ = 135836358. Its totient is φ = 53222400.

The previous prime is 85525813. The next prime is 85525829. The reversal of 85525825 is 52852558.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 27415696 + 58110129 = 5236^2 + 7623^2 .

It is not a de Polignac number, because 85525825 - 2⁷ = 85525697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85525829) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 147937 + ... + 148513.

Almost surely, 2^85525825 is an apocalyptic number.

It is an amenable number.

85525825 is a deficient number, since it is larger than the sum of its proper divisors (50310533).

85525825 is a wasteful number, since it uses less digits than its factorization.

85525825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623 (or 600 counting only the distinct ones).

The product of its digits is 160000, while the sum is 40.

The square root of 85525825 is about 9248.0173550875. The cubic root of 85525825 is about 440.5877561868.

The spelling of 85525825 in words is "eighty-five million, five hundred twenty-five thousand, eight hundred twenty-five".