85181187 has 32 divisors (see below), whose sum is σ = 141901312. Its totient is φ = 44250624.

The previous prime is 85181183. The next prime is 85181219. The reversal of 85181187 is 78118158.

It is not a de Polignac number, because 85181187 - 2² = 85181183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (85181183) 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 31 ways as a sum of consecutive naturals, for example, 15963 + ... + 20619.

It is an arithmetic number, because the mean of its divisors is an integer number (4434416).

Almost surely, 2^85181187 is an apocalyptic number.

85181187 is a deficient number, since it is larger than the sum of its proper divisors (56720125).

85181187 is a wasteful number, since it uses less digits than its factorization.

85181187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4747.

The product of its digits is 17920, while the sum is 39.

The square root of 85181187 is about 9229.3654711470. The cubic root of 85181187 is about 439.9951566271.

The spelling of 85181187 in words is "eighty-five million, one hundred eighty-one thousand, one hundred eighty-seven".