520221622 has 4 divisors (see below), whose sum is σ = 780332436. Its totient is φ = 260110810.

The previous prime is 520221619. The next prime is 520221629. The reversal of 520221622 is 226122025.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 520221593 and 520221602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520221629) 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 as a sum of consecutive naturals, namely, 130055404 + ... + 130055407.

It is an arithmetic number, because the mean of its divisors is an integer number (195083109).

Almost surely, 2^520221622 is an apocalyptic number.

520221622 is a deficient number, since it is larger than the sum of its proper divisors (260110814).

520221622 is a wasteful number, since it uses less digits than its factorization.

520221622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260110813.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 520221622 is about 22808.3673681393. The cubic root of 520221622 is about 804.2593766822.

Adding to 520221622 its reverse (226122025), we get a palindrome (746343647).

The spelling of 520221622 in words is "five hundred twenty million, two hundred twenty-one thousand, six hundred twenty-two".