521630122 has 8 divisors (see below), whose sum is σ = 842633316. Its totient is φ = 240752352.

The previous prime is 521630101. The next prime is 521630141. The reversal of 521630122 is 221036125.

It can be written as a sum of positive squares in 2 ways, for example, as 521619921 + 10201 = 22839^2 + 101^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 521630093 and 521630102.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10031323 + ... + 10031374.

Almost surely, 2^521630122 is an apocalyptic number.

521630122 is a deficient number, since it is larger than the sum of its proper divisors (321003194).

521630122 is a wasteful number, since it uses less digits than its factorization.

521630122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20062712.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 521630122 is about 22839.2233230467. The cubic root of 521630122 is about 804.9845666576.

Adding to 521630122 its reverse (221036125), we get a palindrome (742666247).

The spelling of 521630122 in words is "five hundred twenty-one million, six hundred thirty thousand, one hundred twenty-two".