245222447 has 4 divisors (see below), whose sum is σ = 245291280. Its totient is φ = 245153616.

The previous prime is 245222443. The next prime is 245222449. The reversal of 245222447 is 744222542.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 245222447 - 2² = 245222443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245222441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28763 + ... + 36300.

It is an arithmetic number, because the mean of its divisors is an integer number (61322820).

Almost surely, 2^245222447 is an apocalyptic number.

245222447 is a deficient number, since it is larger than the sum of its proper divisors (68833).

245222447 is an equidigital number, since it uses as much as digits as its factorization.

245222447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68832.

The product of its digits is 35840, while the sum is 32.

The square root of 245222447 is about 15659.5800390687. The cubic root of 245222447 is about 625.9217945766.

Adding to 245222447 its reverse (744222542), we get a palindrome (989444989).

The spelling of 245222447 in words is "two hundred forty-five million, two hundred twenty-two thousand, four hundred forty-seven".