253065217 has 4 divisors (see below), whose sum is σ = 253755136. Its totient is φ = 252375300.

The previous prime is 253065187. The next prime is 253065227. The reversal of 253065217 is 712560352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 253065217 - 2¹¹ = 253063169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253065227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344409 + ... + 345142.

It is an arithmetic number, because the mean of its divisors is an integer number (63438784).

Almost surely, 2^253065217 is an apocalyptic number.

It is an amenable number.

253065217 is a deficient number, since it is larger than the sum of its proper divisors (689919).

253065217 is an equidigital number, since it uses as much as digits as its factorization.

253065217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689918.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 253065217 is about 15908.0236673196. The cubic root of 253065217 is about 632.5246946255.

The spelling of 253065217 in words is "two hundred fifty-three million, sixty-five thousand, two hundred seventeen".