245023217 has 2 divisors, whose sum is σ = 245023218. Its totient is φ = 245023216.

The previous prime is 245023189. The next prime is 245023243. The reversal of 245023217 is 712320542.

It is an a-pointer prime, because the next prime (245023243) can be obtained adding 245023217 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125798656 + 119224561 = 11216^2 + 10919^2 .

It is a cyclic number.

It is not a de Polignac number, because 245023217 - 2⁸ = 245022961 is a prime.

It is not a weakly prime, because it can be changed into another prime (245023277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122511608 + 122511609.

It is an arithmetic number, because the mean of its divisors is an integer number (122511609).

Almost surely, 2^245023217 is an apocalyptic number.

It is an amenable number.

245023217 is a deficient number, since it is larger than the sum of its proper divisors (1).

245023217 is an equidigital number, since it uses as much as digits as its factorization.

245023217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 245023217 is about 15653.2174647898. The cubic root of 245023217 is about 625.7522394274.

Adding to 245023217 its reverse (712320542), we get a palindrome (957343759).

The spelling of 245023217 in words is "two hundred forty-five million, twenty-three thousand, two hundred seventeen".