253278209 has 16 divisors (see below), whose sum is σ = 266577600. Its totient is φ = 240387264.

The previous prime is 253278203. The next prime is 253278211. The reversal of 253278209 is 902872352.

It is a cyclic number.

It is not a de Polignac number, because 253278209 - 2²⁰ = 252229633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (253278203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342362 + ... + 343100.

It is an arithmetic number, because the mean of its divisors is an integer number (16661100).

Almost surely, 2^253278209 is an apocalyptic number.

It is an amenable number.

253278209 is a deficient number, since it is larger than the sum of its proper divisors (13299391).

253278209 is a wasteful number, since it uses less digits than its factorization.

253278209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 253278209 is about 15914.7167426882. The cubic root of 253278209 is about 632.7020993839.

The spelling of 253278209 in words is "two hundred fifty-three million, two hundred seventy-eight thousand, two hundred nine".