253215247 has 2 divisors, whose sum is σ = 253215248. Its totient is φ = 253215246.

The previous prime is 253215241. The next prime is 253215293. The reversal of 253215247 is 742512352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 253215247 - 2¹¹ = 253213199 is a prime.

It is a super-4 number, since 4×253215247⁴ (a number of 35 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253215241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126607623 + 126607624.

It is an arithmetic number, because the mean of its divisors is an integer number (126607624).

Almost surely, 2^253215247 is an apocalyptic number.

253215247 is a deficient number, since it is larger than the sum of its proper divisors (1).

253215247 is an equidigital number, since it uses as much as digits as its factorization.

253215247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 31.

The square root of 253215247 is about 15912.7385135306. The cubic root of 253215247 is about 632.6496675921.

Adding to 253215247 its reverse (742512352), we get a palindrome (995727599).

The spelling of 253215247 in words is "two hundred fifty-three million, two hundred fifteen thousand, two hundred forty-seven".