253665105 has 16 divisors (see below), whose sum is σ = 427225920. Its totient is φ = 128167488.

The previous prime is 253665089. The next prime is 253665107. The reversal of 253665105 is 501566352.

It is not a de Polignac number, because 253665105 - 2⁴ = 253665089 is a prime.

It is a super-2 number, since 2×253665105² = 128691970989322050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (253665107) 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 in 15 ways as a sum of consecutive naturals, for example, 444742 + ... + 445311.

It is an arithmetic number, because the mean of its divisors is an integer number (26701620).

Almost surely, 2^253665105 is an apocalyptic number.

It is an amenable number.

253665105 is a deficient number, since it is larger than the sum of its proper divisors (173560815).

253665105 is a wasteful number, since it uses less digits than its factorization.

253665105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890080.

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 253665105 is about 15926.8673944376. The cubic root of 253665105 is about 633.0240975730.

The spelling of 253665105 in words is "two hundred fifty-three million, six hundred sixty-five thousand, one hundred five".