521224101 has 12 divisors (see below), whose sum is σ = 767085228. Its totient is φ = 340926144.

The previous prime is 521224051. The next prime is 521224117. The reversal of 521224101 is 101422125.

It can be written as a sum of positive squares in 2 ways, for example, as 153735201 + 367488900 = 12399^2 + 19170^2 .

It is not a de Polignac number, because 521224101 - 2¹³ = 521215909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521224141) 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, 545880 + ... + 546833.

It is an arithmetic number, because the mean of its divisors is an integer number (63923769).

Almost surely, 2^521224101 is an apocalyptic number.

It is an amenable number.

521224101 is a deficient number, since it is larger than the sum of its proper divisors (245861127).

521224101 is a wasteful number, since it uses less digits than its factorization.

521224101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092772 (or 1092769 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 521224101 is about 22830.3329147869. The cubic root of 521224101 is about 804.7756539545.

Adding to 521224101 its reverse (101422125), we get a palindrome (622646226).

The spelling of 521224101 in words is "five hundred twenty-one million, two hundred twenty-four thousand, one hundred one".