221324245 has 8 divisors (see below), whose sum is σ = 265958784. Its totient is φ = 176812944.

The previous prime is 221324227. The next prime is 221324261. The reversal of 221324245 is 542423122.

221324245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221324245 - 2¹⁷ = 221193173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26809 + ... + 34078.

It is an arithmetic number, because the mean of its divisors is an integer number (33244848).

Almost surely, 2^221324245 is an apocalyptic number.

It is an amenable number.

221324245 is a deficient number, since it is larger than the sum of its proper divisors (44634539).

221324245 is an equidigital number, since it uses as much as digits as its factorization.

221324245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61619.

The product of its digits is 3840, while the sum is 25.

The square root of 221324245 is about 14876.9702896793. The cubic root of 221324245 is about 604.8898964082.

Adding to 221324245 its reverse (542423122), we get a palindrome (763747367).

The spelling of 221324245 in words is "two hundred twenty-one million, three hundred twenty-four thousand, two hundred forty-five".