220222244515521 has 16 divisors (see below), whose sum is σ = 312915233654784. Its totient is φ = 137443670333904.

The previous prime is 220222244515519. The next prime is 220222244515547. The reversal of 220222244515521 is 125515442222022.

It is not a de Polignac number, because 220222244515521 - 2¹ = 220222244515519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220222244515521.

It is not an unprimeable number, because it can be changed into a prime (220222244515571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33953472631 + ... + 33953479116.

It is an arithmetic number, because the mean of its divisors is an integer number (19557202103424).

Almost surely, 2^{220222244515521} is an apocalyptic number.

It is an amenable number.

220222244515521 is a deficient number, since it is larger than the sum of its proper divisors (92692989139263).

220222244515521 is a wasteful number, since it uses less digits than its factorization.

220222244515521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67906951820.

The product of its (nonzero) digits is 256000, while the sum is 39.

Adding to 220222244515521 its reverse (125515442222022), we get a palindrome (345737686737543).

The spelling of 220222244515521 in words is "two hundred twenty trillion, two hundred twenty-two billion, two hundred forty-four million, five hundred fifteen thousand, five hundred twenty-one".