221676041 has 2 divisors, whose sum is σ = 221676042. Its totient is φ = 221676040.

The previous prime is 221676031. The next prime is 221676043. The reversal of 221676041 is 140676122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189640441 + 32035600 = 13771^2 + 5660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221676041 is a prime.

It is a Sophie Germain prime.

Together with 221676043, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221675995 and 221676013.

It is not a weakly prime, because it can be changed into another prime (221676043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110838020 + 110838021.

It is an arithmetic number, because the mean of its divisors is an integer number (110838021).

Almost surely, 2^221676041 is an apocalyptic number.

It is an amenable number.

221676041 is a deficient number, since it is larger than the sum of its proper divisors (1).

221676041 is an equidigital number, since it uses as much as digits as its factorization.

221676041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 221676041 is about 14888.7891045578. The cubic root of 221676041 is about 605.2102185939.

The spelling of 221676041 in words is "two hundred twenty-one million, six hundred seventy-six thousand, forty-one".