265541251 has 2 divisors, whose sum is σ = 265541252. Its totient is φ = 265541250.

The previous prime is 265541239. The next prime is 265541261. The reversal of 265541251 is 152145562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 265541251 - 2⁵ = 265541219 is a prime.

It is not a weakly prime, because it can be changed into another prime (265541231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132770625 + 132770626.

It is an arithmetic number, because the mean of its divisors is an integer number (132770626).

Almost surely, 2^265541251 is an apocalyptic number.

265541251 is a deficient number, since it is larger than the sum of its proper divisors (1).

265541251 is an equidigital number, since it uses as much as digits as its factorization.

265541251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12000, while the sum is 31.

The square root of 265541251 is about 16295.4365084216. The cubic root of 265541251 is about 642.7528322065.

The spelling of 265541251 in words is "two hundred sixty-five million, five hundred forty-one thousand, two hundred fifty-one".