85197558 has 32 divisors (see below), whose sum is σ = 183191040. Its totient is φ = 26330400.

The previous prime is 85197551. The next prime is 85197559. The reversal of 85197558 is 85579158.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85197551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2593 + ... + 13308.

It is an arithmetic number, because the mean of its divisors is an integer number (5724720).

Almost surely, 2^85197558 is an apocalyptic number.

85197558 is an abundant number, since it is smaller than the sum of its proper divisors (97993482).

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

85197558 is a wasteful number, since it uses less digits than its factorization.

85197558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15972.

The product of its digits is 504000, while the sum is 48.

The square root of 85197558 is about 9230.2523259118. The cubic root of 85197558 is about 440.0233424256.

The spelling of 85197558 in words is "eighty-five million, one hundred ninety-seven thousand, five hundred fifty-eight".