85301221 has 4 divisors (see below), whose sum is σ = 86910732. Its totient is φ = 83691712.

The previous prime is 85301219. The next prime is 85301233. The reversal of 85301221 is 12210358.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12210358 = 2 ⋅6105179.

It can be written as a sum of positive squares in 2 ways, for example, as 38925121 + 46376100 = 6239^2 + 6810^2 .

It is a cyclic number.

It is not a de Polignac number, because 85301221 - 2¹ = 85301219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85301192 and 85301201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85304221) 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, 804676 + ... + 804781.

It is an arithmetic number, because the mean of its divisors is an integer number (21727683).

Almost surely, 2^85301221 is an apocalyptic number.

It is an amenable number.

85301221 is a deficient number, since it is larger than the sum of its proper divisors (1609511).

85301221 is a wasteful number, since it uses less digits than its factorization.

85301221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609510.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 85301221 is about 9235.8660124538. The cubic root of 85301221 is about 440.2017342839.

Adding to 85301221 its reverse (12210358), we get a palindrome (97511579).

The spelling of 85301221 in words is "eighty-five million, three hundred one thousand, two hundred twenty-one".