85142219 has 4 divisors (see below), whose sum is σ = 85612800. Its totient is φ = 84671640.

The previous prime is 85142203. The next prime is 85142227. The reversal of 85142219 is 91224158.

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

It is a cyclic number.

It is not a de Polignac number, because 85142219 - 2⁴ = 85142203 is a prime.

It is a super-2 number, since 2×85142219² = 14498394912487922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85142269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235019 + ... + 235380.

It is an arithmetic number, because the mean of its divisors is an integer number (21403200).

Almost surely, 2^85142219 is an apocalyptic number.

85142219 is a deficient number, since it is larger than the sum of its proper divisors (470581).

85142219 is a wasteful number, since it uses less digits than its factorization.

85142219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470580.

The product of its digits is 5760, while the sum is 32.

The square root of 85142219 is about 9227.2541419428. The cubic root of 85142219 is about 439.9280512521.

The spelling of 85142219 in words is "eighty-five million, one hundred forty-two thousand, two hundred nineteen".