85181101 has 8 divisors (see below), whose sum is σ = 90522360. Its totient is φ = 79876608.

The previous prime is 85181093. The next prime is 85181113. The reversal of 85181101 is 10118158.

It can be written as a sum of positive squares in 4 ways, for example, as 27573001 + 57608100 = 5251^2 + 7590^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85181101 - 2³ = 85181093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85181171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4336 + ... + 13753.

It is an arithmetic number, because the mean of its divisors is an integer number (11315295).

Almost surely, 2^85181101 is an apocalyptic number.

It is an amenable number.

85181101 is a deficient number, since it is larger than the sum of its proper divisors (5341259).

85181101 is a wasteful number, since it uses less digits than its factorization.

85181101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18383.

The product of its (nonzero) digits is 320, while the sum is 25.

The square root of 85181101 is about 9229.3608121039. The cubic root of 85181101 is about 439.9950085522.

Adding to 85181101 its reverse (10118158), we get a palindrome (95299259).

The spelling of 85181101 in words is "eighty-five million, one hundred eighty-one thousand, one hundred one".