245504221097 has 2 divisors, whose sum is σ = 245504221098. Its totient is φ = 245504221096.

The previous prime is 245504221091. The next prime is 245504221139. The reversal of 245504221097 is 790122405542.

245504221097 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., 245362706281 + 141514816 = 495341^2 + 11896^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245504221097 is a prime.

It is not a weakly prime, because it can be changed into another prime (245504221091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122752110548 + 122752110549.

It is an arithmetic number, because the mean of its divisors is an integer number (122752110549).

Almost surely, 2^245504221097 is an apocalyptic number.

It is an amenable number.

245504221097 is a deficient number, since it is larger than the sum of its proper divisors (1).

245504221097 is an equidigital number, since it uses as much as digits as its factorization.

245504221097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 245504221097 in words is "two hundred forty-five billion, five hundred four million, two hundred twenty-one thousand, ninety-seven".