253311217 has 4 divisors (see below), whose sum is σ = 253738980. Its totient is φ = 252883456.

The previous prime is 253311193. The next prime is 253311229. The reversal of 253311217 is 712113352.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103713856 + 149597361 = 10184^2 + 12231^2 .

It is a cyclic number.

It is not a de Polignac number, because 253311217 - 2⁷ = 253311089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253311191 and 253311200.

It is not an unprimeable number, because it can be changed into a prime (253311277) 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, 212992 + ... + 214177.

It is an arithmetic number, because the mean of its divisors is an integer number (63434745).

Almost surely, 2^253311217 is an apocalyptic number.

It is an amenable number.

253311217 is a deficient number, since it is larger than the sum of its proper divisors (427763).

253311217 is an equidigital number, since it uses as much as digits as its factorization.

253311217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427762.

The product of its digits is 1260, while the sum is 25.

The square root of 253311217 is about 15915.7537364713. The cubic root of 253311217 is about 632.7295834219.

Adding to 253311217 its reverse (712113352), we get a palindrome (965424569).

The spelling of 253311217 in words is "two hundred fifty-three million, three hundred eleven thousand, two hundred seventeen".