521222463 has 12 divisors (see below), whose sum is σ = 771240288. Its totient is φ = 339006240.

The previous prime is 521222453. The next prime is 521222477. The reversal of 521222463 is 364222125.

It is a happy number.

It is not a de Polignac number, because 521222463 - 2⁴ = 521222447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521222453) 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 11 ways as a sum of consecutive naturals, for example, 705895 + ... + 706632.

It is an arithmetic number, because the mean of its divisors is an integer number (64270024).

Almost surely, 2^521222463 is an apocalyptic number.

521222463 is a deficient number, since it is larger than the sum of its proper divisors (250017825).

521222463 is a wasteful number, since it uses less digits than its factorization.

521222463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412574 (or 1412571 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 521222463 is about 22830.2970414316. The cubic root of 521222463 is about 804.7748109237.

Adding to 521222463 its reverse (364222125), we get a palindrome (885444588).

The spelling of 521222463 in words is "five hundred twenty-one million, two hundred twenty-two thousand, four hundred sixty-three".