261033005 has 16 divisors (see below), whose sum is σ = 325326144. Its totient is φ = 200914560.

The previous prime is 261032999. The next prime is 261033007. The reversal of 261033005 is 500330162.

It is a de Polignac number, because none of the positive numbers 2^k-261033005 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261033007) 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, 5345 + ... + 23465.

It is an arithmetic number, because the mean of its divisors is an integer number (20332884).

Almost surely, 2^261033005 is an apocalyptic number.

It is an amenable number.

261033005 is a deficient number, since it is larger than the sum of its proper divisors (64293139).

261033005 is a wasteful number, since it uses less digits than its factorization.

261033005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18236.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 261033005 is about 16156.5158682186. The cubic root of 261033005 is about 639.0945896712.

Adding to 261033005 its reverse (500330162), we get a palindrome (761363167).

The spelling of 261033005 in words is "two hundred sixty-one million, thirty-three thousand, five".