505223293 has 2 divisors, whose sum is σ = 505223294. Its totient is φ = 505223292.

The previous prime is 505223287. The next prime is 505223321. The reversal of 505223293 is 392322505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 269846329 + 235376964 = 16427^2 + 15342^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505223293 is a prime.

It is equal to p_26616064 and since 505223293 and 26616064 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505223233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252611646 + 252611647.

It is an arithmetic number, because the mean of its divisors is an integer number (252611647).

Almost surely, 2^505223293 is an apocalyptic number.

It is an amenable number.

505223293 is a deficient number, since it is larger than the sum of its proper divisors (1).

505223293 is an equidigital number, since it uses as much as digits as its factorization.

505223293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 505223293 is about 22477.1727092177. The cubic root of 505223293 is about 796.4547775590.

Adding to 505223293 its reverse (392322505), we get a palindrome (897545798).

The spelling of 505223293 in words is "five hundred five million, two hundred twenty-three thousand, two hundred ninety-three".