85540025 has 12 divisors (see below), whose sum is σ = 106189632. Its totient is φ = 68354640.

The previous prime is 85540009. The next prime is 85540027. The reversal of 85540025 is 52004558.

It is not a de Polignac number, because 85540025 - 2⁴ = 85540009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85540025.

It is not an unprimeable number, because it can be changed into a prime (85540027) 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, 32924 + ... + 35426.

It is an arithmetic number, because the mean of its divisors is an integer number (8849136).

Almost surely, 2^85540025 is an apocalyptic number.

It is an amenable number.

85540025 is a deficient number, since it is larger than the sum of its proper divisors (20649607).

85540025 is a wasteful number, since it uses less digits than its factorization.

85540025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3880 (or 3875 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 85540025 is about 9248.7850553465. The cubic root of 85540025 is about 440.6121386853.

The spelling of 85540025 in words is "eighty-five million, five hundred forty thousand, twenty-five".