245315717 has 4 divisors (see below), whose sum is σ = 245882700. Its totient is φ = 244748736.

The previous prime is 245315711. The next prime is 245315771. The reversal of 245315717 is 717513542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 717513542 = 2 ⋅358756771.

It can be written as a sum of positive squares in 2 ways, for example, as 52911076 + 192404641 = 7274^2 + 13871^2 .

It is a cyclic number.

It is not a de Polignac number, because 245315717 - 2¹² = 245311621 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 (245315711) 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, 282842 + ... + 283707.

It is an arithmetic number, because the mean of its divisors is an integer number (61470675).

Almost surely, 2^245315717 is an apocalyptic number.

It is an amenable number.

245315717 is a deficient number, since it is larger than the sum of its proper divisors (566983).

245315717 is an equidigital number, since it uses as much as digits as its factorization.

245315717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566982.

The product of its digits is 29400, while the sum is 35.

The square root of 245315717 is about 15662.5578051607. The cubic root of 245315717 is about 626.0011406649.

The spelling of 245315717 in words is "two hundred forty-five million, three hundred fifteen thousand, seven hundred seventeen".