22021522 has 8 divisors (see below), whose sum is σ = 33373116. Its totient is φ = 10897152.

The previous prime is 22021507. The next prime is 22021541. The reversal of 22021522 is 22512022.

It can be written as a sum of positive squares in 2 ways, for example, as 21613201 + 408321 = 4649^2 + 639^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 22021496 and 22021505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56563 + ... + 56950.

Almost surely, 2^22021522 is an apocalyptic number.

22021522 is a deficient number, since it is larger than the sum of its proper divisors (11351594).

22021522 is a wasteful number, since it uses less digits than its factorization.

22021522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113612.

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

The square root of 22021522 is about 4692.7094519052. The cubic root of 22021522 is about 280.2952752414.

Adding to 22021522 its reverse (22512022), we get a palindrome (44533544).

The spelling of 22021522 in words is "twenty-two million, twenty-one thousand, five hundred twenty-two".