85425538 has 16 divisors (see below), whose sum is σ = 140039424. Its totient is φ = 38759760.

The previous prime is 85425533. The next prime is 85425551. The reversal of 85425538 is 83552458.

It is a self number, because there is not a number n which added to its sum of digits gives 85425538.

It is not an unprimeable number, because it can be changed into a prime (85425533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10156 + ... + 16552.

It is an arithmetic number, because the mean of its divisors is an integer number (8752464).

Almost surely, 2^85425538 is an apocalyptic number.

85425538 is a deficient number, since it is larger than the sum of its proper divisors (54613886).

85425538 is a wasteful number, since it uses less digits than its factorization.

85425538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7017.

The product of its digits is 192000, while the sum is 40.

The square root of 85425538 is about 9242.5936835934. The cubic root of 85425538 is about 440.4154787645.

Subtracting from 85425538 its reverse (83552458), we obtain a triangular number (1873080 = T₁₉₃₅).

The spelling of 85425538 in words is "eighty-five million, four hundred twenty-five thousand, five hundred thirty-eight".