522747225 has 216 divisors, whose sum is σ = 1272654656. Its totient is φ = 199584000.

The previous prime is 522747221. The next prime is 522747271.

522747225 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 522747225 - 2² = 522747221 is a prime.

It is a super-2 number, since 2×522747225² = 546529322490401250, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 522747225.

It is not an unprimeable number, because it can be changed into a prime (522747221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 2477370 + ... + 2477580.

Almost surely, 2^522747225 is an apocalyptic number.

522747225 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

522747225 is an abundant number, since it is smaller than the sum of its proper divisors (749907431).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

522747225 is a wasteful number, since it uses less digits than its factorization.

522747225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 250 counting only the distinct ones).

The product of its digits is 78400, while the sum is 36.

The square root of 522747225 is about 22863.6660446220. Note that the first 3 decimals coincide. The cubic root of 522747225 is about 805.5587982606.

It can be divided in two parts, 522 and 747225, that added together give a palindrome (747747).

The spelling of 522747225 in words is "five hundred twenty-two million, seven hundred forty-seven thousand, two hundred twenty-five".