85591554 has 16 divisors (see below), whose sum is σ = 171737280. Its totient is φ = 28438160.

The previous prime is 85591531. The next prime is 85591573. The reversal of 85591554 is 45519558.

It is a happy number.

It is a super-2 number, since 2×85591554² = 14651828232269832, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21069 + ... + 24800.

It is an arithmetic number, because the mean of its divisors is an integer number (10733580).

Almost surely, 2^85591554 is an apocalyptic number.

85591554 is an abundant number, since it is smaller than the sum of its proper divisors (86145726).

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

85591554 is a wasteful number, since it uses less digits than its factorization.

85591554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46185.

The product of its digits is 180000, while the sum is 42.

The square root of 85591554 is about 9251.5703531887. The cubic root of 85591554 is about 440.7005953091.

The spelling of 85591554 in words is "eighty-five million, five hundred ninety-one thousand, five hundred fifty-four".