22240521 has 8 divisors (see below), whose sum is σ = 32948960. Its totient is φ = 14826996.

The previous prime is 22240501. The next prime is 22240553. The reversal of 22240521 is 12504222.

It is not a de Polignac number, because 22240521 - 2⁶ = 22240457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22240494 and 22240503.

It is not an unprimeable number, because it can be changed into a prime (22240501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411835 + ... + 411888.

It is an arithmetic number, because the mean of its divisors is an integer number (4118620).

Almost surely, 2^22240521 is an apocalyptic number.

It is an amenable number.

22240521 is a deficient number, since it is larger than the sum of its proper divisors (10708439).

22240521 is an equidigital number, since it uses as much as digits as its factorization.

22240521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823732 (or 823726 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 22240521 is about 4715.9856870012. The cubic root of 22240521 is about 281.2213695300.

Adding to 22240521 its reverse (12504222), we get a palindrome (34744743).

The spelling of 22240521 in words is "twenty-two million, two hundred forty thousand, five hundred twenty-one".