22135521 has 8 divisors (see below), whose sum is σ = 29574720. Its totient is φ = 14726672.

The previous prime is 22135517. The next prime is 22135537. The reversal of 22135521 is 12553122.

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

It is a cyclic number.

It is not a de Polignac number, because 22135521 - 2² = 22135517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22135541) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 5826 + ... + 8843.

It is an arithmetic number, because the mean of its divisors is an integer number (3696840).

Almost surely, 2^22135521 is an apocalyptic number.

It is an amenable number.

22135521 is a deficient number, since it is larger than the sum of its proper divisors (7439199).

22135521 is a wasteful number, since it uses less digits than its factorization.

22135521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15175.

The product of its digits is 600, while the sum is 21.

The square root of 22135521 is about 4704.8401673171. The cubic root of 22135521 is about 280.7781120065.

Adding to 22135521 its reverse (12553122), we get a palindrome (34688643).

The spelling of 22135521 in words is "twenty-two million, one hundred thirty-five thousand, five hundred twenty-one".