261033101 has 16 divisors (see below), whose sum is σ = 306875520. Its totient is φ = 217374720.

The previous prime is 261033083. The next prime is 261033103. The reversal of 261033101 is 101330162.

It is a cyclic number.

It is not a de Polignac number, because 261033101 - 2¹⁸ = 260770957 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 261033101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261033103) 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, 71990 + ... + 75528.

It is an arithmetic number, because the mean of its divisors is an integer number (19179720).

Almost surely, 2^261033101 is an apocalyptic number.

It is an amenable number.

261033101 is a deficient number, since it is larger than the sum of its proper divisors (45842419).

261033101 is a wasteful number, since it uses less digits than its factorization.

261033101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3844.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 261033101 is about 16156.5188391559. The cubic root of 261033101 is about 639.0946680177.

Adding to 261033101 its reverse (101330162), we get a palindrome (362363263).

The spelling of 261033101 in words is "two hundred sixty-one million, thirty-three thousand, one hundred one".