85764221 has 8 divisors (see below), whose sum is σ = 87230400. Its totient is φ = 84303648.

The previous prime is 85764181. The next prime is 85764247. The reversal of 85764221 is 12246758.

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

It is a cyclic number.

It is not a de Polignac number, because 85764221 - 2¹⁸ = 85502077 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 (85764121) 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, 39065 + ... + 41201.

It is an arithmetic number, because the mean of its divisors is an integer number (10903800).

Almost surely, 2^85764221 is an apocalyptic number.

It is an amenable number.

85764221 is a deficient number, since it is larger than the sum of its proper divisors (1466179).

85764221 is a wasteful number, since it uses less digits than its factorization.

85764221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2803.

The product of its digits is 26880, while the sum is 35.

The square root of 85764221 is about 9260.8974187170. The cubic root of 85764221 is about 440.9967434453.

The spelling of 85764221 in words is "eighty-five million, seven hundred sixty-four thousand, two hundred twenty-one".