253085665 has 8 divisors (see below), whose sum is σ = 347088960. Its totient is φ = 173544432.

The previous prime is 253085641. The next prime is 253085669. The reversal of 253085665 is 566580352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 253085665 - 2¹¹ = 253083617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253085669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3615475 + ... + 3615544.

It is an arithmetic number, because the mean of its divisors is an integer number (43386120).

Almost surely, 2^253085665 is an apocalyptic number.

It is an amenable number.

253085665 is a deficient number, since it is larger than the sum of its proper divisors (94003295).

253085665 is an equidigital number, since it uses as much as digits as its factorization.

253085665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7231031.

The product of its (nonzero) digits is 216000, while the sum is 40.

The square root of 253085665 is about 15908.6663488804. Note that the first 3 decimals coincide. The cubic root of 253085665 is about 632.5417304405.

The spelling of 253085665 in words is "two hundred fifty-three million, eighty-five thousand, six hundred sixty-five".