85216305 has 16 divisors (see below), whose sum is σ = 136463040. Its totient is φ = 45409728.

The previous prime is 85216301. The next prime is 85216321. The reversal of 85216305 is 50361258.

It is not a de Polignac number, because 85216305 - 2² = 85216301 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (85216301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27526 + ... + 30464.

It is an arithmetic number, because the mean of its divisors is an integer number (8528940).

Almost surely, 2^85216305 is an apocalyptic number.

It is an amenable number.

85216305 is a deficient number, since it is larger than the sum of its proper divisors (51246735).

85216305 is a wasteful number, since it uses less digits than its factorization.

85216305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4880.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 85216305 is about 9231.2677894209. The cubic root of 85216305 is about 440.0556145267.

The spelling of 85216305 in words is "eighty-five million, two hundred sixteen thousand, three hundred five".