22033521 has 24 divisors (see below), whose sum is σ = 33696000. Its totient is φ = 13835232.

The previous prime is 22033519. The next prime is 22033541. The reversal of 22033521 is 12533022.

It is not a de Polignac number, because 22033521 - 2¹ = 22033519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22033494 and 22033503.

It is not an unprimeable number, because it can be changed into a prime (22033511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45760 + ... + 46238.

It is an arithmetic number, because the mean of its divisors is an integer number (1404000).

Almost surely, 2^22033521 is an apocalyptic number.

It is an amenable number.

22033521 is a deficient number, since it is larger than the sum of its proper divisors (11662479).

22033521 is a wasteful number, since it uses less digits than its factorization.

22033521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773 (or 770 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 22033521 is about 4693.9877503036. The cubic root of 22033521 is about 280.3461747257.

Adding to 22033521 its reverse (12533022), we get a palindrome (34566543).

The spelling of 22033521 in words is "twenty-two million, thirty-three thousand, five hundred twenty-one".