85814067221 has 4 divisors (see below), whose sum is σ = 85870119744. Its totient is φ = 85758014700.

The previous prime is 85814067211. The next prime is 85814067257. The reversal of 85814067221 is 12276041858.

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 85814067221 - 2¹⁰ = 85814066197 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 (85814067211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28023965 + ... + 28027026.

It is an arithmetic number, because the mean of its divisors is an integer number (21467529936).

Almost surely, 2^85814067221 is an apocalyptic number.

It is an amenable number.

85814067221 is a deficient number, since it is larger than the sum of its proper divisors (56052523).

85814067221 is a wasteful number, since it uses less digits than its factorization.

85814067221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56052522.

The product of its (nonzero) digits is 215040, while the sum is 44.

The spelling of 85814067221 in words is "eighty-five billion, eight hundred fourteen million, sixty-seven thousand, two hundred twenty-one".