85523181 has 8 divisors (see below), whose sum is σ = 114396480. Its totient is φ = 56832672.

The previous prime is 85523147. The next prime is 85523183. The reversal of 85523181 is 18132558.

It is a happy number.

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

It is not a de Polignac number, because 85523181 - 2¹⁴ = 85506797 is a prime.

It is a super-2 number, since 2×85523181² = 14628428976717522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85523183) 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, 44601 + ... + 46478.

It is an arithmetic number, because the mean of its divisors is an integer number (14299560).

Almost surely, 2^85523181 is an apocalyptic number.

It is an amenable number.

85523181 is a deficient number, since it is larger than the sum of its proper divisors (28873299).

85523181 is a wasteful number, since it uses less digits than its factorization.

85523181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91395.

The product of its digits is 9600, while the sum is 33.

The square root of 85523181 is about 9247.8744044240. The cubic root of 85523181 is about 440.5832159362.

The spelling of 85523181 in words is "eighty-five million, five hundred twenty-three thousand, one hundred eighty-one".