265865153 has 2 divisors, whose sum is σ = 265865154. Its totient is φ = 265865152.

The previous prime is 265865143. The next prime is 265865167. The reversal of 265865153 is 351568562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216472369 + 49392784 = 14713^2 + 7028^2 .

It is a cyclic number.

It is not a de Polignac number, because 265865153 - 2¹⁴ = 265848769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 265865153.

It is not a weakly prime, because it can be changed into another prime (265865143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132932576 + 132932577.

It is an arithmetic number, because the mean of its divisors is an integer number (132932577).

Almost surely, 2^265865153 is an apocalyptic number.

It is an amenable number.

265865153 is a deficient number, since it is larger than the sum of its proper divisors (1).

265865153 is an equidigital number, since it uses as much as digits as its factorization.

265865153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216000, while the sum is 41.

The square root of 265865153 is about 16305.3719062154. The cubic root of 265865153 is about 643.0140651111.

The spelling of 265865153 in words is "two hundred sixty-five million, eight hundred sixty-five thousand, one hundred fifty-three".