85081212 has 48 divisors (see below), whose sum is σ = 221104800. Its totient is φ = 28293120.

The previous prime is 85081211. The next prime is 85081253. The reversal of 85081212 is 21218058.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85081211) 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 15 ways as a sum of consecutive naturals, for example, 68614 + ... + 69842.

It is an arithmetic number, because the mean of its divisors is an integer number (4606350).

Almost surely, 2^85081212 is an apocalyptic number.

It is an amenable number.

85081212 is an abundant number, since it is smaller than the sum of its proper divisors (136023588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85081212 is a wasteful number, since it uses less digits than its factorization.

85081212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883 (or 1875 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 85081212 is about 9223.9477448650. The cubic root of 85081212 is about 439.8229521848.

The spelling of 85081212 in words is "eighty-five million, eighty-one thousand, two hundred twelve".