205226506505 has 16 divisors (see below), whose sum is σ = 251629943040. Its totient is φ = 160612401792.

The previous prime is 205226506483. The next prime is 205226506553. The reversal of 205226506505 is 505605622502.

It is a cyclic number.

It is not a de Polignac number, because 205226506505 - 2¹⁴ = 205226490121 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297866 + ... + 706524.

It is an arithmetic number, because the mean of its divisors is an integer number (15726871440).

Almost surely, 2^205226506505 is an apocalyptic number.

It is an amenable number.

205226506505 is a deficient number, since it is larger than the sum of its proper divisors (46403436535).

205226506505 is a wasteful number, since it uses less digits than its factorization.

205226506505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410848.

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 205226506505 in words is "two hundred five billion, two hundred twenty-six million, five hundred six thousand, five hundred five".