221130245 has 8 divisors (see below), whose sum is σ = 303264384. Its totient is φ = 151632144.

The previous prime is 221130229. The next prime is 221130263. The reversal of 221130245 is 542031122.

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 221130245 - 2⁴ = 221130229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3158969 + ... + 3159038.

It is an arithmetic number, because the mean of its divisors is an integer number (37908048).

Almost surely, 2^221130245 is an apocalyptic number.

It is an amenable number.

221130245 is a deficient number, since it is larger than the sum of its proper divisors (82134139).

221130245 is an equidigital number, since it uses as much as digits as its factorization.

221130245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6318019.

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

The square root of 221130245 is about 14870.4487154894. The cubic root of 221130245 is about 604.7131076074.

Adding to 221130245 its reverse (542031122), we get a palindrome (763161367).

The spelling of 221130245 in words is "two hundred twenty-one million, one hundred thirty thousand, two hundred forty-five".