501213 has 4 divisors (see below), whose sum is σ = 668288. Its totient is φ = 334140.

The previous prime is 501209. The next prime is 501217. The reversal of 501213 is 312105.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (501209) and next prime (501217).

It is not a de Polignac number, because 501213 - 2² = 501209 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501217) 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 3 ways as a sum of consecutive naturals, for example, 83533 + ... + 83538.

It is an arithmetic number, because the mean of its divisors is an integer number (167072).

2⁵⁰¹²¹³ is an apocalyptic number.

It is an amenable number.

501213 is a deficient number, since it is larger than the sum of its proper divisors (167075).

501213 is a wasteful number, since it uses less digits than its factorization.

501213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167074.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 501213 is about 707.9639821347. The cubic root of 501213 is about 79.4341846807.

Adding to 501213 its reverse (312105), we get a palindrome (813318).

It can be divided in two parts, 5012 and 13, that multiplied together give a palindrome (65156).

The spelling of 501213 in words is "five hundred one thousand, two hundred thirteen".