261893255 has 8 divisors (see below), whose sum is σ = 338446752. Its totient is φ = 193398048.

The previous prime is 261893243. The next prime is 261893293. The reversal of 261893255 is 552398162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261893255 - 2⁸ = 261892999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2014499 + ... + 2014628.

It is an arithmetic number, because the mean of its divisors is an integer number (42305844).

Almost surely, 2^261893255 is an apocalyptic number.

261893255 is a deficient number, since it is larger than the sum of its proper divisors (76553497).

261893255 is a wasteful number, since it uses less digits than its factorization.

261893255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4029145.

The product of its digits is 129600, while the sum is 41.

The square root of 261893255 is about 16183.1163562523. The cubic root of 261893255 is about 639.7958781008.

The spelling of 261893255 in words is "two hundred sixty-one million, eight hundred ninety-three thousand, two hundred fifty-five".