83435221 has 2 divisors, whose sum is σ = 83435222. Its totient is φ = 83435220.

The previous prime is 83435173. The next prime is 83435239. The reversal of 83435221 is 12253438.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48790225 + 34644996 = 6985^2 + 5886^2 .

It is a cyclic number.

It is not a de Polignac number, because 83435221 - 2⁹ = 83434709 is a prime.

It is a super-2 number, since 2×83435221² = 13922872206637682, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83435221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83435281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41717610 + 41717611.

It is an arithmetic number, because the mean of its divisors is an integer number (41717611).

Almost surely, 2^83435221 is an apocalyptic number.

It is an amenable number.

83435221 is a deficient number, since it is larger than the sum of its proper divisors (1).

83435221 is an equidigital number, since it uses as much as digits as its factorization.

83435221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 28.

The square root of 83435221 is about 9134.2882043430. The cubic root of 83435221 is about 436.9681740180.

Adding to 83435221 its reverse (12253438), we get a palindrome (95688659).

The spelling of 83435221 in words is "eighty-three million, four hundred thirty-five thousand, two hundred twenty-one".