85040221 has 4 divisors (see below), whose sum is σ = 97188832. Its totient is φ = 72891612.

The previous prime is 85040213. The next prime is 85040227. The reversal of 85040221 is 12204058.

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 85040221 - 2³ = 85040213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85040192 and 85040201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85040227) 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, 6074295 + ... + 6074308.

It is an arithmetic number, because the mean of its divisors is an integer number (24297208).

Almost surely, 2^85040221 is an apocalyptic number.

It is an amenable number.

85040221 is a deficient number, since it is larger than the sum of its proper divisors (12148611).

85040221 is a wasteful number, since it uses less digits than its factorization.

85040221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12148610.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 85040221 is about 9221.7254892997. The cubic root of 85040221 is about 439.7523072158.

Adding to 85040221 its reverse (12204058), we get a palindrome (97244279).

The spelling of 85040221 in words is "eighty-five million, forty thousand, two hundred twenty-one".