245653217 has 4 divisors (see below), whose sum is σ = 245693700. Its totient is φ = 245612736.

The previous prime is 245653201. The next prime is 245653231. The reversal of 245653217 is 712356542.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5527201 + 240126016 = 2351^2 + 15496^2 .

It is a cyclic number.

It is not a de Polignac number, because 245653217 - 2⁴ = 245653201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245653267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9092 + ... + 23957.

It is an arithmetic number, because the mean of its divisors is an integer number (61423425).

Almost surely, 2^245653217 is an apocalyptic number.

It is an amenable number.

245653217 is a deficient number, since it is larger than the sum of its proper divisors (40483).

245653217 is an equidigital number, since it uses as much as digits as its factorization.

245653217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40482.

The product of its digits is 50400, while the sum is 35.

The square root of 245653217 is about 15673.3282043094. The cubic root of 245653217 is about 626.2880886737.

The spelling of 245653217 in words is "two hundred forty-five million, six hundred fifty-three thousand, two hundred seventeen".