522207124321 has 3 divisors (see below), whose sum is σ = 522207846961. Its totient is φ = 522206401682.

The previous prime is 522207124301. The next prime is 522207124403. The reversal of 522207124321 is 123421702225.

The square root of 522207124321 is 722639.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-522207124321 is a prime.

It is a super-2 number, since 2×522207124321² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (522207124301) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 361320 + ... + 1083958.

Almost surely, 2^522207124321 is an apocalyptic number.

522207124321 is the 722639-th square number.

522207124321 is the 361320-th centered octagonal number.

It is an amenable number.

522207124321 is a deficient number, since it is larger than the sum of its proper divisors (722640).

522207124321 is an frugal number, since it uses more digits than its factorization.

522207124321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445278 (or 722639 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

Adding to 522207124321 its reverse (123421702225), we get a palindrome (645628826546).

The spelling of 522207124321 in words is "five hundred twenty-two billion, two hundred seven million, one hundred twenty-four thousand, three hundred twenty-one".