505323551 has 2 divisors, whose sum is σ = 505323552. Its totient is φ = 505323550.

The previous prime is 505323527. The next prime is 505323607. The reversal of 505323551 is 155323505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505323551 - 2¹⁰ = 505322527 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505323751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252661775 + 252661776.

It is an arithmetic number, because the mean of its divisors is an integer number (252661776).

Almost surely, 2^505323551 is an apocalyptic number.

505323551 is a deficient number, since it is larger than the sum of its proper divisors (1).

505323551 is an equidigital number, since it uses as much as digits as its factorization.

505323551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11250, while the sum is 29.

The square root of 505323551 is about 22479.4028168010. The cubic root of 505323551 is about 796.5074576860.

The spelling of 505323551 in words is "five hundred five million, three hundred twenty-three thousand, five hundred fifty-one".