521251222 has 16 divisors (see below), whose sum is σ = 799167600. Its totient is φ = 254910240.

The previous prime is 521251217. The next prime is 521251303. The reversal of 521251222 is 222152125.

It is a junction number, because it is equal to n+sod(n) for n = 521251193 and 521251202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9904 + ... + 33772.

It is an arithmetic number, because the mean of its divisors is an integer number (49947975).

Almost surely, 2^521251222 is an apocalyptic number.

521251222 is a deficient number, since it is larger than the sum of its proper divisors (277916378).

521251222 is a wasteful number, since it uses less digits than its factorization.

521251222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24111.

The product of its digits is 800, while the sum is 22.

The square root of 521251222 is about 22830.9268756220. The cubic root of 521251222 is about 804.7896120849.

The spelling of 521251222 in words is "five hundred twenty-one million, two hundred fifty-one thousand, two hundred twenty-two".