85558551 has 16 divisors (see below), whose sum is σ = 128196096. Its totient is φ = 50361696.

The previous prime is 85558549. The next prime is 85558573. The reversal of 85558551 is 15585558.

It is not a de Polignac number, because 85558551 - 2¹ = 85558549 is a prime.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 46795 + ... + 48588.

It is an arithmetic number, because the mean of its divisors is an integer number (8012256).

Almost surely, 2^85558551 is an apocalyptic number.

85558551 is a deficient number, since it is larger than the sum of its proper divisors (42637545).

85558551 is a wasteful number, since it uses less digits than its factorization.

85558551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95422.

The product of its digits is 200000, while the sum is 42.

The square root of 85558551 is about 9249.7865380775. The cubic root of 85558551 is about 440.6439452042.

The spelling of 85558551 in words is "eighty-five million, five hundred fifty-eight thousand, five hundred fifty-one".