253642247 has 2 divisors, whose sum is σ = 253642248. Its totient is φ = 253642246.

The previous prime is 253642231. The next prime is 253642283. The reversal of 253642247 is 742246352.

253642247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 253642247 - 2⁴ = 253642231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253642747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126821123 + 126821124.

It is an arithmetic number, because the mean of its divisors is an integer number (126821124).

Almost surely, 2^253642247 is an apocalyptic number.

253642247 is a deficient number, since it is larger than the sum of its proper divisors (1).

253642247 is an equidigital number, since it uses as much as digits as its factorization.

253642247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 35.

The square root of 253642247 is about 15926.1497858082. The cubic root of 253642247 is about 633.0050828705.

Adding to 253642247 its reverse (742246352), we get a palindrome (995888599).

The spelling of 253642247 in words is "two hundred fifty-three million, six hundred forty-two thousand, two hundred forty-seven".