205102822993 has 2 divisors, whose sum is σ = 205102822994. Its totient is φ = 205102822992.

The previous prime is 205102822949. The next prime is 205102823011. The reversal of 205102822993 is 399228201502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144504138769 + 60598684224 = 380137^2 + 246168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205102822993 is a prime.

It is not a weakly prime, because it can be changed into another prime (205102822933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102551411496 + 102551411497.

It is an arithmetic number, because the mean of its divisors is an integer number (102551411497).

Almost surely, 2^205102822993 is an apocalyptic number.

It is an amenable number.

205102822993 is a deficient number, since it is larger than the sum of its proper divisors (1).

205102822993 is an equidigital number, since it uses as much as digits as its factorization.

205102822993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 205102822993 in words is "two hundred five billion, one hundred two million, eight hundred twenty-two thousand, nine hundred ninety-three".