85217574 has 48 divisors (see below), whose sum is σ = 190577664. Its totient is φ = 25365600.

The previous prime is 85217569. The next prime is 85217597. The reversal of 85217574 is 47571258.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30079 + ... + 32789.

It is an arithmetic number, because the mean of its divisors is an integer number (3970368).

Almost surely, 2^85217574 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85217574, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95288832).

85217574 is an abundant number, since it is smaller than the sum of its proper divisors (105360090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85217574 is a wasteful number, since it uses less digits than its factorization.

85217574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773 (or 2760 counting only the distinct ones).

The product of its digits is 78400, while the sum is 39.

The square root of 85217574 is about 9231.3365229527. The cubic root of 85217574 is about 440.0577988810.

The spelling of 85217574 in words is "eighty-five million, two hundred seventeen thousand, five hundred seventy-four".