505513413 has 16 divisors (see below), whose sum is σ = 774734400. Its totient is φ = 325387440.

The previous prime is 505513387. The next prime is 505513427. The reversal of 505513413 is 314315505.

It is not a de Polignac number, because 505513413 - 2⁵ = 505513381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505513433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322023 + ... + 323588.

It is an arithmetic number, because the mean of its divisors is an integer number (48420900).

Almost surely, 2^505513413 is an apocalyptic number.

It is an amenable number.

505513413 is a deficient number, since it is larger than the sum of its proper divisors (269220987).

505513413 is a wasteful number, since it uses less digits than its factorization.

505513413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645649 (or 645643 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 505513413 is about 22483.6254416409. The cubic root of 505513413 is about 796.6072007535.

Adding to 505513413 its reverse (314315505), we get a palindrome (819828918).

The spelling of 505513413 in words is "five hundred five million, five hundred thirteen thousand, four hundred thirteen".