253955551 has 2 divisors, whose sum is σ = 253955552. Its totient is φ = 253955550.

The previous prime is 253955519. The next prime is 253955609. The reversal of 253955551 is 155559352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 253955551 - 2⁵ = 253955519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253955651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126977775 + 126977776.

It is an arithmetic number, because the mean of its divisors is an integer number (126977776).

Almost surely, 2^253955551 is an apocalyptic number.

253955551 is a deficient number, since it is larger than the sum of its proper divisors (1).

253955551 is an equidigital number, since it uses as much as digits as its factorization.

253955551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168750, while the sum is 40.

The square root of 253955551 is about 15935.9829003422. The cubic root of 253955551 is about 633.2656091634.

The spelling of 253955551 in words is "two hundred fifty-three million, nine hundred fifty-five thousand, five hundred fifty-one".