245122317 has 48 divisors (see below), whose sum is σ = 401296896. Its totient is φ = 142884000.

The previous prime is 245122309. The next prime is 245122349. The reversal of 245122317 is 713221542.

It is not a de Polignac number, because 245122317 - 2³ = 245122309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245122117) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 301842 + ... + 302652.

It is an arithmetic number, because the mean of its divisors is an integer number (8360352).

Almost surely, 2^245122317 is an apocalyptic number.

It is an amenable number.

245122317 is a deficient number, since it is larger than the sum of its proper divisors (156174579).

245122317 is a wasteful number, since it uses less digits than its factorization.

245122317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942 (or 939 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 245122317 is about 15656.3826281808. The cubic root of 245122317 is about 625.8365901940.

Adding to 245122317 its reverse (713221542), we get a palindrome (958343859).

The spelling of 245122317 in words is "two hundred forty-five million, one hundred twenty-two thousand, three hundred seventeen".