261334255 has 32 divisors (see below), whose sum is σ = 393289344. Its totient is φ = 162279936.

The previous prime is 261334169. The next prime is 261334267. The reversal of 261334255 is 552433162.

It is a happy number.

It is not a de Polignac number, because 261334255 - 2¹⁷ = 261203183 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18697 + ... + 29533.

It is an arithmetic number, because the mean of its divisors is an integer number (12290292).

Almost surely, 2^261334255 is an apocalyptic number.

261334255 is a deficient number, since it is larger than the sum of its proper divisors (131955089).

261334255 is a wasteful number, since it uses less digits than its factorization.

261334255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10915.

The product of its digits is 21600, while the sum is 31.

The square root of 261334255 is about 16165.8360439539. The cubic root of 261334255 is about 639.3403481585.

The spelling of 261334255 in words is "two hundred sixty-one million, three hundred thirty-four thousand, two hundred fifty-five".