253155484721 has 2 divisors, whose sum is σ = 253155484722. Its totient is φ = 253155484720.

The previous prime is 253155484711. The next prime is 253155484741. The reversal of 253155484721 is 127484551352.

It is a happy number.

253155484721 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 can be written as a sum of positive squares in only one way, i.e., 151799848225 + 101355636496 = 389615^2 + 318364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253155484721 is a prime.

It is not a weakly prime, because it can be changed into another prime (253155484711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126577742360 + 126577742361.

It is an arithmetic number, because the mean of its divisors is an integer number (126577742361).

Almost surely, 2^253155484721 is an apocalyptic number.

It is an amenable number.

253155484721 is a deficient number, since it is larger than the sum of its proper divisors (1).

253155484721 is an equidigital number, since it uses as much as digits as its factorization.

253155484721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344000, while the sum is 47.

The spelling of 253155484721 in words is "two hundred fifty-three billion, one hundred fifty-five million, four hundred eighty-four thousand, seven hundred twenty-one".