221649301 has 2 divisors, whose sum is σ = 221649302. Its totient is φ = 221649300.

The previous prime is 221649293. The next prime is 221649331. The reversal of 221649301 is 103946122.

221649301 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., 201668401 + 19980900 = 14201^2 + 4470^2 .

It is a cyclic number.

It is not a de Polignac number, because 221649301 - 2³ = 221649293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221649301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221649331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110824650 + 110824651.

It is an arithmetic number, because the mean of its divisors is an integer number (110824651).

Almost surely, 2^221649301 is an apocalyptic number.

It is an amenable number.

221649301 is a deficient number, since it is larger than the sum of its proper divisors (1).

221649301 is an equidigital number, since it uses as much as digits as its factorization.

221649301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 221649301 is about 14887.8910863829. The cubic root of 221649301 is about 605.1858828231.

The spelling of 221649301 in words is "two hundred twenty-one million, six hundred forty-nine thousand, three hundred one".