85184181 has 6 divisors (see below), whose sum is σ = 123043830. Its totient is φ = 56789448.

The previous prime is 85184171. The next prime is 85184213. The reversal of 85184181 is 18148158.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 83722500 + 1461681 = 9150^2 + 1209^2 .

It is not a de Polignac number, because 85184181 - 2⁵ = 85184149 is a prime.

It is a super-2 number, since 2×85184181² = 14512689385281522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85184171) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4732446 + ... + 4732463.

It is an arithmetic number, because the mean of its divisors is an integer number (20507305).

Almost surely, 2^85184181 is an apocalyptic number.

It is an amenable number.

85184181 is a deficient number, since it is larger than the sum of its proper divisors (37859649).

85184181 is a wasteful number, since it uses less digits than its factorization.

85184181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9464915 (or 9464912 counting only the distinct ones).

The product of its digits is 10240, while the sum is 36.

The square root of 85184181 is about 9229.5276693881. The cubic root of 85184181 is about 440.0003116389. Note that the first 3 decimals are identical.

The spelling of 85184181 in words is "eighty-five million, one hundred eighty-four thousand, one hundred eighty-one".