85199816 has 16 divisors (see below), whose sum is σ = 172038300. Its totient is φ = 39322944.

The previous prime is 85199809. The next prime is 85199827. The reversal of 85199816 is 61899158.

85199816 = 1459² + 1460² + ... + 1497².

It can be written as a sum of positive squares in 2 ways, for example, as 84088900 + 1110916 = 9170^2 + 1054^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409511 + ... + 409718.

Almost surely, 2^85199816 is an apocalyptic number.

It is an amenable number.

85199816 is an abundant number, since it is smaller than the sum of its proper divisors (86838484).

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

85199816 is a wasteful number, since it uses less digits than its factorization.

85199816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819248 (or 819244 counting only the distinct ones).

The product of its digits is 155520, while the sum is 47.

The square root of 85199816 is about 9230.3746402841. The cubic root of 85199816 is about 440.0272297198.

The spelling of 85199816 in words is "eighty-five million, one hundred ninety-nine thousand, eight hundred sixteen".