320020216522 has 4 divisors (see below), whose sum is σ = 480030324786. Its totient is φ = 160010108260.

The previous prime is 320020216513. The next prime is 320020216573. The reversal of 320020216522 is 225612020023.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 319970104281 + 50112241 = 565659^2 + 7079^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80005054129 + ... + 80005054132.

Almost surely, 2^320020216522 is an apocalyptic number.

320020216522 is a deficient number, since it is larger than the sum of its proper divisors (160010108264).

320020216522 is a wasteful number, since it uses less digits than its factorization.

320020216522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160010108263.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 320020216522 its reverse (225612020023), we get a palindrome (545632236545).

The spelling of 320020216522 in words is "three hundred twenty billion, twenty million, two hundred sixteen thousand, five hundred twenty-two".