20221522 has 4 divisors (see below), whose sum is σ = 30332286. Its totient is φ = 10110760.

The previous prime is 20221489. The next prime is 20221541. The reversal of 20221522 is 22512202.

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., 20169081 + 52441 = 4491^2 + 229^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20221496 and 20221505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055379 + ... + 5055382.

Almost surely, 2^20221522 is an apocalyptic number.

20221522 is a deficient number, since it is larger than the sum of its proper divisors (10110764).

20221522 is a wasteful number, since it uses less digits than its factorization.

20221522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10110763.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20221522 is about 4496.8346645168. The cubic root of 20221522 is about 272.4402562401.

Adding to 20221522 its reverse (22512202), we get a palindrome (42733724).

The spelling of 20221522 in words is "twenty million, two hundred twenty-one thousand, five hundred twenty-two".