522012421 has 16 divisors (see below), whose sum is σ = 632479104. Its totient is φ = 420585984.

The previous prime is 522012419. The next prime is 522012431. The reversal of 522012421 is 124210225.

It is not a de Polignac number, because 522012421 - 2¹ = 522012419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522012401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111106 + ... + 115708.

It is an arithmetic number, because the mean of its divisors is an integer number (39529944).

Almost surely, 2^522012421 is an apocalyptic number.

It is an amenable number.

522012421 is a deficient number, since it is larger than the sum of its proper divisors (110466683).

522012421 is a wasteful number, since it uses less digits than its factorization.

522012421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5580.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 522012421 is about 22847.5911421751. The cubic root of 522012421 is about 805.1811744525.

Adding to 522012421 its reverse (124210225), we get a palindrome (646222646).

The spelling of 522012421 in words is "five hundred twenty-two million, twelve thousand, four hundred twenty-one".