245233217 has 2 divisors, whose sum is σ = 245233218. Its totient is φ = 245233216.

The previous prime is 245233201. The next prime is 245233231. The reversal of 245233217 is 712332542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205176976 + 40056241 = 14324^2 + 6329^2 .

It is a cyclic number.

It is not a de Polignac number, because 245233217 - 2⁴ = 245233201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245233217.

It is not a weakly prime, because it can be changed into another prime (245239217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122616608 + 122616609.

It is an arithmetic number, because the mean of its divisors is an integer number (122616609).

Almost surely, 2^245233217 is an apocalyptic number.

It is an amenable number.

245233217 is a deficient number, since it is larger than the sum of its proper divisors (1).

245233217 is an equidigital number, since it uses as much as digits as its factorization.

245233217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 29.

The square root of 245233217 is about 15659.9239142468. The cubic root of 245233217 is about 625.9309577930.

Adding to 245233217 its reverse (712332542), we get a palindrome (957565759).

The spelling of 245233217 in words is "two hundred forty-five million, two hundred thirty-three thousand, two hundred seventeen".