85821316 has 24 divisors (see below), whose sum is σ = 173347776. Its totient is φ = 36415200.

The previous prime is 85821311. The next prime is 85821317. The reversal of 85821316 is 61312858.

It is not an unprimeable number, because it can be changed into a prime (85821311) 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, 12346 + ... + 18001.

It is an arithmetic number, because the mean of its divisors is an integer number (7222824).

Almost surely, 2^85821316 is an apocalyptic number.

It is an amenable number.

85821316 is an abundant number, since it is smaller than the sum of its proper divisors (87526460).

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

85821316 is a wasteful number, since it uses less digits than its factorization.

85821316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30459 (or 30457 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 85821316 is about 9263.9794904782. The cubic root of 85821316 is about 441.0945819282.

The spelling of 85821316 in words is "eighty-five million, eight hundred twenty-one thousand, three hundred sixteen".