205280061 has 24 divisors (see below), whose sum is σ = 319630464. Its totient is φ = 116847360.

The previous prime is 205280059. The next prime is 205280069. The reversal of 205280061 is 160082502.

It is not a de Polignac number, because 205280061 - 2¹ = 205280059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205280069) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37261 + ... + 42413.

It is an arithmetic number, because the mean of its divisors is an integer number (13317936).

Almost surely, 2^205280061 is an apocalyptic number.

205280061 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

205280061 is a deficient number, since it is larger than the sum of its proper divisors (114350403).

205280061 is a wasteful number, since it uses less digits than its factorization.

205280061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5441 (or 5434 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 205280061 is about 14327.5978796168. The cubic root of 205280061 is about 589.9052428499.

The spelling of 205280061 in words is "two hundred five million, two hundred eighty thousand, sixty-one".