85493181 has 8 divisors (see below), whose sum is σ = 115166464. Its totient is φ = 56407680.

The previous prime is 85493143. The next prime is 85493197. The reversal of 85493181 is 18139458.

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

It is not a de Polignac number, because 85493181 - 2⁹ = 85492669 is a prime.

It is a super-2 number, since 2×85493181² = 14618167994997522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85493281) 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, 146605 + ... + 147186.

It is an arithmetic number, because the mean of its divisors is an integer number (14395808).

Almost surely, 2^85493181 is an apocalyptic number.

It is an amenable number.

85493181 is a deficient number, since it is larger than the sum of its proper divisors (29673283).

85493181 is a wasteful number, since it uses less digits than its factorization.

85493181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293891.

The product of its digits is 34560, while the sum is 39.

The square root of 85493181 is about 9246.2522678110. The cubic root of 85493181 is about 440.5316936779.

The spelling of 85493181 in words is "eighty-five million, four hundred ninety-three thousand, one hundred eighty-one".