85181441 has 8 divisors (see below), whose sum is σ = 91894824. Its totient is φ = 78657280.

The previous prime is 85181431. The next prime is 85181501. The reversal of 85181441 is 14418158.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14554225 + 70627216 = 3815^2 + 8404^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85181441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 85181398 and 85181407.

It is not an unprimeable number, because it can be changed into a prime (85181431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46370 + ... + 48171.

It is an arithmetic number, because the mean of its divisors is an integer number (11486853).

Almost surely, 2^85181441 is an apocalyptic number.

It is an amenable number.

85181441 is a deficient number, since it is larger than the sum of its proper divisors (6713383).

85181441 is a wasteful number, since it uses less digits than its factorization.

85181441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94611.

The product of its digits is 5120, while the sum is 32.

The square root of 85181441 is about 9229.3792315627. The cubic root of 85181441 is about 439.9955939641.

Adding to 85181441 its reverse (14418158), we get a palindrome (99599599).

The spelling of 85181441 in words is "eighty-five million, one hundred eighty-one thousand, four hundred forty-one".