83218481 has 2 divisors, whose sum is σ = 83218482. Its totient is φ = 83218480.

The previous prime is 83218441. The next prime is 83218483. The reversal of 83218481 is 18481238.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44890000 + 38328481 = 6700^2 + 6191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83218481 is a prime.

It is a super-2 number, since 2×83218481² = 13850631159894722, which contains 22 as substring.

Together with 83218483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (83218483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41609240 + 41609241.

It is an arithmetic number, because the mean of its divisors is an integer number (41609241).

Almost surely, 2^83218481 is an apocalyptic number.

It is an amenable number.

83218481 is a deficient number, since it is larger than the sum of its proper divisors (1).

83218481 is an equidigital number, since it uses as much as digits as its factorization.

83218481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12288, while the sum is 35.

The square root of 83218481 is about 9122.4164013709. The cubic root of 83218481 is about 436.5894746004.

The spelling of 83218481 in words is "eighty-three million, two hundred eighteen thousand, four hundred eighty-one".