85205019 has 8 divisors (see below), whose sum is σ = 117271552. Its totient is φ = 54970920.

The previous prime is 85205017. The next prime is 85205023. The reversal of 85205019 is 91050258.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85205019 - 2¹ = 85205017 is a prime.

It is a super-2 number, since 2×85205019² = 14519790525580722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85205017) 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, 457999 + ... + 458184.

It is an arithmetic number, because the mean of its divisors is an integer number (14658944).

Almost surely, 2^85205019 is an apocalyptic number.

85205019 is a deficient number, since it is larger than the sum of its proper divisors (32066533).

85205019 is a wasteful number, since it uses less digits than its factorization.

85205019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916217.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 85205019 is about 9230.6564771960. The cubic root of 85205019 is about 440.0361867621.

The spelling of 85205019 in words is "eighty-five million, two hundred five thousand, nineteen".