265281155 has 4 divisors (see below), whose sum is σ = 318337392. Its totient is φ = 212224920.

The previous prime is 265281151. The next prime is 265281199. The reversal of 265281155 is 551182562.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 265281155 - 2² = 265281151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265281151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26528111 + ... + 26528120.

It is an arithmetic number, because the mean of its divisors is an integer number (79584348).

Almost surely, 2^265281155 is an apocalyptic number.

265281155 is a deficient number, since it is larger than the sum of its proper divisors (53056237).

265281155 is an equidigital number, since it uses as much as digits as its factorization.

265281155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53056236.

The product of its digits is 24000, while the sum is 35.

The square root of 265281155 is about 16287.4539139793. The cubic root of 265281155 is about 642.5429061870.

The spelling of 265281155 in words is "two hundred sixty-five million, two hundred eighty-one thousand, one hundred fifty-five".