205550013407 has 2 divisors, whose sum is σ = 205550013408. Its totient is φ = 205550013406.

The previous prime is 205550013377. The next prime is 205550013439. The reversal of 205550013407 is 704310055502.

It is an a-pointer prime, because the next prime (205550013439) can be obtained adding 205550013407 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205550013407 - 2²² = 205545819103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205550093407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102775006703 + 102775006704.

It is an arithmetic number, because the mean of its divisors is an integer number (102775006704).

Almost surely, 2^205550013407 is an apocalyptic number.

205550013407 is a deficient number, since it is larger than the sum of its proper divisors (1).

205550013407 is an equidigital number, since it uses as much as digits as its factorization.

205550013407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21000, while the sum is 32.

Adding to 205550013407 its reverse (704310055502), we get a palindrome (909860068909).

The spelling of 205550013407 in words is "two hundred five billion, five hundred fifty million, thirteen thousand, four hundred seven".