221065373 has 2 divisors, whose sum is σ = 221065374. Its totient is φ = 221065372.

The previous prime is 221065349. The next prime is 221065381. The reversal of 221065373 is 373560122.

221065373 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192571129 + 28494244 = 13877^2 + 5338^2 .

It is a cyclic number.

It is not a de Polignac number, because 221065373 - 2¹⁸ = 220803229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221065073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110532686 + 110532687.

It is an arithmetic number, because the mean of its divisors is an integer number (110532687).

Almost surely, 2^221065373 is an apocalyptic number.

It is an amenable number.

221065373 is a deficient number, since it is larger than the sum of its proper divisors (1).

221065373 is an equidigital number, since it uses as much as digits as its factorization.

221065373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 221065373 is about 14868.2673166714. The cubic root of 221065373 is about 604.6539678223.

The spelling of 221065373 in words is "two hundred twenty-one million, sixty-five thousand, three hundred seventy-three".