522221520 has 80 divisors (see below), whose sum is σ = 1621414080. Its totient is φ = 139041792.

The previous prime is 522221489. The next prime is 522221533. The reversal of 522221520 is 25122225.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×522221520² = 545430631902220800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204411 + ... + 206949.

It is an arithmetic number, because the mean of its divisors is an integer number (20267676).

Almost surely, 2^522221520 is an apocalyptic number.

It is an amenable number.

522221520 is an abundant number, since it is smaller than the sum of its proper divisors (1099192560).

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

522221520 is a wasteful number, since it uses less digits than its factorization.

522221520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3412 (or 3406 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 522221520 is about 22852.1666368859. The cubic root of 522221520 is about 805.2886687678.

Adding to 522221520 its reverse (25122225), we get a palindrome (547343745).

The spelling of 522221520 in words is "five hundred twenty-two million, two hundred twenty-one thousand, five hundred twenty".