501240213 has 12 divisors (see below), whose sum is σ = 726593868. Its totient is φ = 332969280.

The previous prime is 501240193. The next prime is 501240247. The reversal of 501240213 is 312042105.

It can be written as a sum of positive squares in 2 ways, for example, as 398481444 + 102758769 = 19962^2 + 10137^2 .

It is not a de Polignac number, because 501240213 - 2⁹ = 501239701 is a prime.

It is a super-2 number, since 2×501240213² = 502483502256570738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501240283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96570 + ... + 101627.

It is an arithmetic number, because the mean of its divisors is an integer number (60549489).

Almost surely, 2^501240213 is an apocalyptic number.

It is an amenable number.

501240213 is a deficient number, since it is larger than the sum of its proper divisors (225353655).

501240213 is a wasteful number, since it uses less digits than its factorization.

501240213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198484 (or 198481 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 501240213 is about 22388.3946052414. The cubic root of 501240213 is about 794.3562226205.

Adding to 501240213 its reverse (312042105), we get a palindrome (813282318).

The spelling of 501240213 in words is "five hundred one million, two hundred forty thousand, two hundred thirteen".