85079221 has 4 divisors (see below), whose sum is σ = 87823744. Its totient is φ = 82334700.

The previous prime is 85079219. The next prime is 85079249. The reversal of 85079221 is 12297058.

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 85079221 - 2¹ = 85079219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85076221) 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, 1372215 + ... + 1372276.

It is an arithmetic number, because the mean of its divisors is an integer number (21955936).

Almost surely, 2^85079221 is an apocalyptic number.

It is an amenable number.

85079221 is a deficient number, since it is larger than the sum of its proper divisors (2744523).

85079221 is a wasteful number, since it uses less digits than its factorization.

85079221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2744522.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 85079221 is about 9223.8398186439. The cubic root of 85079221 is about 439.8195213673.

The spelling of 85079221 in words is "eighty-five million, seventy-nine thousand, two hundred twenty-one".