855221312 has 112 divisors (see below), whose sum is σ = 2063983680. Its totient is φ = 346521600.

The previous prime is 855221287. The next prime is 855221321. The reversal of 855221312 is 213122558.

It is an unprimeable number.

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, 225512 + ... + 229272.

Almost surely, 2^855221312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 855221312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1031991840).

855221312 is an abundant number, since it is smaller than the sum of its proper divisors (1208762368).

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

855221312 is a wasteful number, since it uses less digits than its factorization.

855221312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3820 (or 3810 counting only the distinct ones).

The product of its digits is 4800, while the sum is 29.

The square root of 855221312 is about 29244.1671449197. The cubic root of 855221312 is about 949.2038803901.

The spelling of 855221312 in words is "eight hundred fifty-five million, two hundred twenty-one thousand, three hundred twelve".