512222321 has 8 divisors (see below), whose sum is σ = 564453120. Its totient is φ = 461824272.

The previous prime is 512222317. The next prime is 512222327. The reversal of 512222321 is 123222215.

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

It is not a de Polignac number, because 512222321 - 2² = 512222317 is a prime.

It is a super-2 number, since 2×512222321² = 524743412261254082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 512222293 and 512222302.

It is not an unprimeable number, because it can be changed into a prime (512222327) 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, 457601 + ... + 458718.

It is an arithmetic number, because the mean of its divisors is an integer number (70556640).

Almost surely, 2^512222321 is an apocalyptic number.

It is an amenable number.

512222321 is a deficient number, since it is larger than the sum of its proper divisors (52230799).

512222321 is a wasteful number, since it uses less digits than its factorization.

512222321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916375.

The product of its digits is 480, while the sum is 20.

The square root of 512222321 is about 22632.3291112515. The cubic root of 512222321 is about 800.1157754318.

Adding to 512222321 its reverse (123222215), we get a palindrome (635444536).

The spelling of 512222321 in words is "five hundred twelve million, two hundred twenty-two thousand, three hundred twenty-one".