505224409 has 2 divisors, whose sum is σ = 505224410. Its totient is φ = 505224408.

The previous prime is 505224367. The next prime is 505224413. The reversal of 505224409 is 904422505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 332880025 + 172344384 = 18245^2 + 13128^2 .

It is a cyclic number.

It is not a de Polignac number, because 505224409 - 2¹⁵ = 505191641 is a prime.

It is not a weakly prime, because it can be changed into another prime (505224439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252612204 + 252612205.

It is an arithmetic number, because the mean of its divisors is an integer number (252612205).

Almost surely, 2^505224409 is an apocalyptic number.

It is an amenable number.

505224409 is a deficient number, since it is larger than the sum of its proper divisors (1).

505224409 is an equidigital number, since it uses as much as digits as its factorization.

505224409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 505224409 is about 22477.1975343903. The cubic root of 505224409 is about 796.4553639947.

The spelling of 505224409 in words is "five hundred five million, two hundred twenty-four thousand, four hundred nine".