253280665 has 16 divisors (see below), whose sum is σ = 332810496. Its totient is φ = 183513600.

The previous prime is 253280653. The next prime is 253280683. The reversal of 253280665 is 566082352.

It is a happy number.

It is not a de Polignac number, because 253280665 - 2⁷ = 253280537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6409 + ... + 23401.

It is an arithmetic number, because the mean of its divisors is an integer number (20800656).

Almost surely, 2^253280665 is an apocalyptic number.

It is an amenable number.

253280665 is a deficient number, since it is larger than the sum of its proper divisors (79529831).

253280665 is a wasteful number, since it uses less digits than its factorization.

253280665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17280.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 253280665 is about 15914.7939037865. The cubic root of 253280665 is about 632.7041444491.

The spelling of 253280665 in words is "two hundred fifty-three million, two hundred eighty thousand, six hundred sixty-five".