221324105 has 16 divisors (see below), whose sum is σ = 281627280. Its totient is φ = 166397952.

The previous prime is 221324093. The next prime is 221324113. The reversal of 221324105 is 501423122.

It can be written as a sum of positive squares in 8 ways, for example, as 1721344 + 219602761 = 1312^2 + 14819^2 .

It is a cyclic number.

It is not a de Polignac number, because 221324105 - 2¹⁴ = 221307721 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73061 + ... + 76029.

It is an arithmetic number, because the mean of its divisors is an integer number (17601705).

Almost surely, 2^221324105 is an apocalyptic number.

It is an amenable number.

221324105 is a deficient number, since it is larger than the sum of its proper divisors (60303175).

221324105 is a wasteful number, since it uses less digits than its factorization.

221324105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3868.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 221324105 is about 14876.9655844194. The cubic root of 221324105 is about 604.8897688659.

Adding to 221324105 its reverse (501423122), we get a palindrome (722747227).

The spelling of 221324105 in words is "two hundred twenty-one million, three hundred twenty-four thousand, one hundred five".