85019161 has 4 divisors (see below), whose sum is σ = 85049524. Its totient is φ = 84988800.

The previous prime is 85019153. The next prime is 85019171. The reversal of 85019161 is 16191058.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41525136 + 43494025 = 6444^2 + 6595^2 .

It is a cyclic number.

It is not a de Polignac number, because 85019161 - 2³ = 85019153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85019171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10500 + ... + 16741.

It is an arithmetic number, because the mean of its divisors is an integer number (21262381).

Almost surely, 2^85019161 is an apocalyptic number.

It is an amenable number.

85019161 is a deficient number, since it is larger than the sum of its proper divisors (30363).

85019161 is a wasteful number, since it uses less digits than its factorization.

85019161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30362.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 85019161 is about 9220.5835498628. The cubic root of 85019161 is about 439.7160030290.

The spelling of 85019161 in words is "eighty-five million, nineteen thousand, one hundred sixty-one".