83442181 has 2 divisors, whose sum is σ = 83442182. Its totient is φ = 83442180.

The previous prime is 83442119. The next prime is 83442187. The reversal of 83442181 is 18124438.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81162081 + 2280100 = 9009^2 + 1510^2 .

It is a cyclic number.

It is not a de Polignac number, because 83442181 - 2¹⁵ = 83409413 is a prime.

It is a super-2 number, since 2×83442181² = 13925195140073522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83442187) 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, 41721090 + 41721091.

It is an arithmetic number, because the mean of its divisors is an integer number (41721091).

Almost surely, 2^83442181 is an apocalyptic number.

It is an amenable number.

83442181 is a deficient number, since it is larger than the sum of its proper divisors (1).

83442181 is an equidigital number, since it uses as much as digits as its factorization.

83442181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 31.

The square root of 83442181 is about 9134.6691784651. The cubic root of 83442181 is about 436.9803240185.

The spelling of 83442181 in words is "eighty-three million, four hundred forty-two thousand, one hundred eighty-one".