221790941 has 2 divisors, whose sum is σ = 221790942. Its totient is φ = 221790940.

The previous prime is 221790931. The next prime is 221790967. The reversal of 221790941 is 149097122.

221790941 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221116900 + 674041 = 14870^2 + 821^2 .

It is a cyclic number.

It is not a de Polignac number, because 221790941 - 2¹⁰ = 221789917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221790901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110895470 + 110895471.

It is an arithmetic number, because the mean of its divisors is an integer number (110895471).

Almost surely, 2^221790941 is an apocalyptic number.

It is an amenable number.

221790941 is a deficient number, since it is larger than the sum of its proper divisors (1).

221790941 is an equidigital number, since it uses as much as digits as its factorization.

221790941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 221790941 is about 14892.6472126348. The cubic root of 221790941 is about 605.3147655155.

The spelling of 221790941 in words is "two hundred twenty-one million, seven hundred ninety thousand, nine hundred forty-one".