205233309281 has 16 divisors (see below), whose sum is σ = 275558011008. Its totient is φ = 147620361600.

The previous prime is 205233309241. The next prime is 205233309283. The reversal of 205233309281 is 182903332502.

It is a cyclic number.

It is not a de Polignac number, because 205233309281 - 2¹⁰ = 205233308257 is a prime.

It is a super-2 number, since 2×205233309281² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205233309283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102513140 + ... + 102515141.

It is an arithmetic number, because the mean of its divisors is an integer number (17222375688).

Almost surely, 2^205233309281 is an apocalyptic number.

It is an amenable number.

205233309281 is a deficient number, since it is larger than the sum of its proper divisors (70324701727).

205233309281 is a wasteful number, since it uses less digits than its factorization.

205233309281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205028312.

The product of its (nonzero) digits is 77760, while the sum is 38.

It can be divided in two parts, 2052 and 33309281, that added together give a palindrome (33311333).

The spelling of 205233309281 in words is "two hundred five billion, two hundred thirty-three million, three hundred nine thousand, two hundred eighty-one".