506212321 has 8 divisors (see below), whose sum is σ = 513748224. Its totient is φ = 498687840.

The previous prime is 506212283. The next prime is 506212327. The reversal of 506212321 is 123212605.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 506212321 - 2⁹ = 506211809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 506212292 and 506212301.

It is not an unprimeable number, because it can be changed into a prime (506212327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133960 + ... + 137686.

It is an arithmetic number, because the mean of its divisors is an integer number (64218528).

Almost surely, 2^506212321 is an apocalyptic number.

It is an amenable number.

506212321 is a deficient number, since it is larger than the sum of its proper divisors (7535903).

506212321 is a wasteful number, since it uses less digits than its factorization.

506212321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5711.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 506212321 is about 22499.1626733085. The cubic root of 506212321 is about 796.9741536002.

Adding to 506212321 its reverse (123212605), we get a palindrome (629424926).

The spelling of 506212321 in words is "five hundred six million, two hundred twelve thousand, three hundred twenty-one".