245146217 has 2 divisors, whose sum is σ = 245146218. Its totient is φ = 245146216.

The previous prime is 245146211. The next prime is 245146261. The reversal of 245146217 is 712641542.

245146217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204747481 + 40398736 = 14309^2 + 6356^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245146217 is a prime.

It is a super-2 number, since 2×245146217² = 120193335418822178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (245146211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122573108 + 122573109.

It is an arithmetic number, because the mean of its divisors is an integer number (122573109).

Almost surely, 2^245146217 is an apocalyptic number.

It is an amenable number.

245146217 is a deficient number, since it is larger than the sum of its proper divisors (1).

245146217 is an equidigital number, since it uses as much as digits as its factorization.

245146217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 32.

The square root of 245146217 is about 15657.1458765638. The cubic root of 245146217 is about 625.8569297107.

Adding to 245146217 its reverse (712641542), we get a palindrome (957787759).

The spelling of 245146217 in words is "two hundred forty-five million, one hundred forty-six thousand, two hundred seventeen".