253021553 has 2 divisors, whose sum is σ = 253021554. Its totient is φ = 253021552.

The previous prime is 253021541. The next prime is 253021583. The reversal of 253021553 is 355120352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131515024 + 121506529 = 11468^2 + 11023^2 .

It is a cyclic number.

It is not a de Polignac number, because 253021553 - 2⁸ = 253021297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (253021513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126510776 + 126510777.

It is an arithmetic number, because the mean of its divisors is an integer number (126510777).

Almost surely, 2^253021553 is an apocalyptic number.

It is an amenable number.

253021553 is a deficient number, since it is larger than the sum of its proper divisors (1).

253021553 is an equidigital number, since it uses as much as digits as its factorization.

253021553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 253021553 is about 15906.6512189084. The cubic root of 253021553 is about 632.4883138233.

The spelling of 253021553 in words is "two hundred fifty-three million, twenty-one thousand, five hundred fifty-three".