521552226 has 64 divisors (see below), whose sum is σ = 1167457536. Its totient is φ = 154291200.

The previous prime is 521552201. The next prime is 521552281. The reversal of 521552226 is 622255125.

It is a junction number, because it is equal to n+sod(n) for n = 521552193 and 521552202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 225910 + ... + 228206.

It is an arithmetic number, because the mean of its divisors is an integer number (18241524).

Almost surely, 2^521552226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521552226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (583728768).

521552226 is an abundant number, since it is smaller than the sum of its proper divisors (645905310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521552226 is a wasteful number, since it uses less digits than its factorization.

521552226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2427.

The product of its digits is 12000, while the sum is 30.

The square root of 521552226 is about 22837.5179474478. The cubic root of 521552226 is about 804.9444947134.

The spelling of 521552226 in words is "five hundred twenty-one million, five hundred fifty-two thousand, two hundred twenty-six".