245211019913 has 2 divisors, whose sum is σ = 245211019914. Its totient is φ = 245211019912.

The previous prime is 245211019873. The next prime is 245211020039. The reversal of 245211019913 is 319910112542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161288985664 + 83922034249 = 401608^2 + 289693^2 .

It is a cyclic number.

It is not a de Polignac number, because 245211019913 - 2²⁴ = 245194242697 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (245211019813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122605509956 + 122605509957.

It is an arithmetic number, because the mean of its divisors is an integer number (122605509957).

Almost surely, 2^245211019913 is an apocalyptic number.

It is an amenable number.

245211019913 is a deficient number, since it is larger than the sum of its proper divisors (1).

245211019913 is an equidigital number, since it uses as much as digits as its factorization.

245211019913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 38.

The spelling of 245211019913 in words is "two hundred forty-five billion, two hundred eleven million, nineteen thousand, nine hundred thirteen".