85558513 has 4 divisors (see below), whose sum is σ = 87645348. Its totient is φ = 83471680.

The previous prime is 85558511. The next prime is 85558523. The reversal of 85558513 is 31585558.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33039504 + 52519009 = 5748^2 + 7247^2 .

It is a cyclic number.

It is not a de Polignac number, because 85558513 - 2¹ = 85558511 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85558511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1043356 + ... + 1043437.

It is an arithmetic number, because the mean of its divisors is an integer number (21911337).

Almost surely, 2^85558513 is an apocalyptic number.

It is an amenable number.

85558513 is a deficient number, since it is larger than the sum of its proper divisors (2086835).

85558513 is a wasteful number, since it uses less digits than its factorization.

85558513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086834.

The product of its digits is 120000, while the sum is 40.

The square root of 85558513 is about 9249.7844839758. The cubic root of 85558513 is about 440.6438799683.

The spelling of 85558513 in words is "eighty-five million, five hundred fifty-eight thousand, five hundred thirteen".