85155811 has 16 divisors (see below), whose sum is σ = 94536288. Its totient is φ = 76204800.

The previous prime is 85155809. The next prime is 85155841. The reversal of 85155811 is 11855158.

It is a cyclic number.

It is not a de Polignac number, because 85155811 - 2¹ = 85155809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85155841) 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, 104596 + ... + 105406.

It is an arithmetic number, because the mean of its divisors is an integer number (5908518).

Almost surely, 2^85155811 is an apocalyptic number.

85155811 is a deficient number, since it is larger than the sum of its proper divisors (9380477).

85155811 is a wasteful number, since it uses less digits than its factorization.

85155811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062.

The product of its digits is 8000, while the sum is 34.

The square root of 85155811 is about 9227.9906263498. The cubic root of 85155811 is about 439.9514598657.

The spelling of 85155811 in words is "eighty-five million, one hundred fifty-five thousand, eight hundred eleven".