261133235 has 16 divisors (see below), whose sum is σ = 351088992. Its totient is φ = 184780800.

The previous prime is 261133217. The next prime is 261133241. The reversal of 261133235 is 532331162.

It is not a de Polignac number, because 261133235 - 2¹⁴ = 261116851 is a prime.

It is a Duffinian number.

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, 62126 + ... + 66195.

It is an arithmetic number, because the mean of its divisors is an integer number (21943062).

Almost surely, 2^261133235 is an apocalyptic number.

261133235 is a deficient number, since it is larger than the sum of its proper divisors (89955757).

261133235 is a wasteful number, since it uses less digits than its factorization.

261133235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128374.

The product of its digits is 3240, while the sum is 26.

The square root of 261133235 is about 16159.6174150256. The cubic root of 261133235 is about 639.1763778647.

Adding to 261133235 its reverse (532331162), we get a palindrome (793464397).

The spelling of 261133235 in words is "two hundred sixty-one million, one hundred thirty-three thousand, two hundred thirty-five".