85842221 has 4 divisors (see below), whose sum is σ = 86518272. Its totient is φ = 85166172.

The previous prime is 85842217. The next prime is 85842259. The reversal of 85842221 is 12224858.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85842221 - 2² = 85842217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85842271) 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, 337835 + ... + 338088.

It is an arithmetic number, because the mean of its divisors is an integer number (21629568).

Almost surely, 2^85842221 is an apocalyptic number.

It is an amenable number.

85842221 is a deficient number, since it is larger than the sum of its proper divisors (676051).

85842221 is a wasteful number, since it uses less digits than its factorization.

85842221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676050.

The product of its digits is 10240, while the sum is 32.

The square root of 85842221 is about 9265.1077165892. The cubic root of 85842221 is about 441.1303940630.

The spelling of 85842221 in words is "eighty-five million, eight hundred forty-two thousand, two hundred twenty-one".