83360221 has 18 divisors (see below), whose sum is σ = 99153438. Its totient is φ = 69859440.

The previous prime is 83360219. The next prime is 83360227. The reversal of 83360221 is 12206338.

It can be written as a sum of positive squares in only one way, i.e., 49196196 + 34164025 = 7014^2 + 5845^2 .

It is not a de Polignac number, because 83360221 - 2¹ = 83360219 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 (83360227) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 499080 + ... + 499246.

Almost surely, 2^83360221 is an apocalyptic number.

It is an amenable number.

83360221 is a deficient number, since it is larger than the sum of its proper divisors (15793217).

83360221 is an equidigital number, since it uses as much as digits as its factorization.

83360221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 83360221 is about 9130.1818711349. The cubic root of 83360221 is about 436.8372043973.

Adding to 83360221 its reverse (12206338), we get a palindrome (95566559).

The spelling of 83360221 in words is "eighty-three million, three hundred sixty thousand, two hundred twenty-one".