505140313 has 2 divisors, whose sum is σ = 505140314. Its totient is φ = 505140312.

The previous prime is 505140281. The next prime is 505140331. The reversal of 505140313 is 313041505.

It is a happy number.

Together with next prime (505140331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 503418969 + 1721344 = 22437^2 + 1312^2 .

It is a cyclic number.

It is not a de Polignac number, because 505140313 - 2⁵ = 505140281 is a prime.

It is not a weakly prime, because it can be changed into another prime (505140343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252570156 + 252570157.

It is an arithmetic number, because the mean of its divisors is an integer number (252570157).

Almost surely, 2^505140313 is an apocalyptic number.

It is an amenable number.

505140313 is a deficient number, since it is larger than the sum of its proper divisors (1).

505140313 is an equidigital number, since it uses as much as digits as its factorization.

505140313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 505140313 is about 22475.3267606947. The cubic root of 505140313 is about 796.4111708100.

Adding to 505140313 its reverse (313041505), we get a palindrome (818181818).

The spelling of 505140313 in words is "five hundred five million, one hundred forty thousand, three hundred thirteen".