501213313 has 4 divisors (see below), whose sum is σ = 501357780. Its totient is φ = 501068848.

The previous prime is 501213287. The next prime is 501213337. The reversal of 501213313 is 313312105.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 175483009 + 325730304 = 13247^2 + 18048^2 .

It is a cyclic number.

It is not a de Polignac number, because 501213313 - 2⁵ = 501213281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501213373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66898 + ... + 74011.

It is an arithmetic number, because the mean of its divisors is an integer number (125339445).

Almost surely, 2^501213313 is an apocalyptic number.

It is an amenable number.

501213313 is a deficient number, since it is larger than the sum of its proper divisors (144467).

501213313 is a wasteful number, since it uses less digits than its factorization.

501213313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144466.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 501213313 is about 22387.7938395010. The cubic root of 501213313 is about 794.3420121587.

Adding to 501213313 its reverse (313312105), we get a palindrome (814525418).

The spelling of 501213313 in words is "five hundred one million, two hundred thirteen thousand, three hundred thirteen".