85181331 has 8 divisors (see below), whose sum is σ = 113770944. Its totient is φ = 56689640.

The previous prime is 85181329. The next prime is 85181347. The reversal of 85181331 is 13318158.

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 85181331 - 2¹ = 85181329 is a prime.

It is a super-2 number, since 2×85181331² = 14511718301863122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85181431) 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, 22425 + ... + 25946.

It is an arithmetic number, because the mean of its divisors is an integer number (14221368).

Almost surely, 2^85181331 is an apocalyptic number.

85181331 is a deficient number, since it is larger than the sum of its proper divisors (28589613).

85181331 is a wasteful number, since it uses less digits than its factorization.

85181331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48961.

The product of its digits is 2880, while the sum is 30.

The square root of 85181331 is about 9229.3732723300. The cubic root of 85181331 is about 439.9954045663.

Adding to 85181331 its reverse (13318158), we get a palindrome (98499489).

The spelling of 85181331 in words is "eighty-five million, one hundred eighty-one thousand, three hundred thirty-one".