85497181 has 8 divisors (see below), whose sum is σ = 106593984. Its totient is φ = 66621120.

The previous prime is 85497151. The next prime is 85497229. The reversal of 85497181 is 18179458.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 85497181 - 2¹¹ = 85495133 is a prime.

It is a super-2 number, since 2×85497181² = 14619535917893522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85497151) 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, 555100 + ... + 555253.

It is an arithmetic number, because the mean of its divisors is an integer number (13324248).

Almost surely, 2^85497181 is an apocalyptic number.

It is an amenable number.

85497181 is a deficient number, since it is larger than the sum of its proper divisors (21096803).

85497181 is a wasteful number, since it uses less digits than its factorization.

85497181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110371.

The product of its digits is 80640, while the sum is 43.

The square root of 85497181 is about 9246.4685691349. The cubic root of 85497181 is about 440.5385640086.

The spelling of 85497181 in words is "eighty-five million, four hundred ninety-seven thousand, one hundred eighty-one".