253215317 has 2 divisors, whose sum is σ = 253215318. Its totient is φ = 253215316.

The previous prime is 253215301. The next prime is 253215343. The reversal of 253215317 is 713512352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 248661361 + 4553956 = 15769^2 + 2134^2 .

It is a cyclic number.

It is not a de Polignac number, because 253215317 - 2⁴ = 253215301 is a prime.

It is a super-4 number, since 4×253215317⁴ (a number of 35 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 253215317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253215917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126607658 + 126607659.

It is an arithmetic number, because the mean of its divisors is an integer number (126607659).

Almost surely, 2^253215317 is an apocalyptic number.

It is an amenable number.

253215317 is a deficient number, since it is larger than the sum of its proper divisors (1).

253215317 is an equidigital number, since it uses as much as digits as its factorization.

253215317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6300, while the sum is 29.

The square root of 253215317 is about 15912.7407130262. The cubic root of 253215317 is about 632.6497258896.

Adding to 253215317 its reverse (713512352), we get a palindrome (966727669).

The spelling of 253215317 in words is "two hundred fifty-three million, two hundred fifteen thousand, three hundred seventeen".