22121536 has 28 divisors (see below), whose sum is σ = 44165520. Its totient is φ = 10993280.

The previous prime is 22121531. The next prime is 22121543. The reversal of 22121536 is 63512122.

It is not an unprimeable number, because it can be changed into a prime (22121531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10491 + ... + 12421.

It is an arithmetic number, because the mean of its divisors is an integer number (1577340).

Almost surely, 2^22121536 is an apocalyptic number.

It is an amenable number.

22121536 is a deficient number, since it is larger than the sum of its proper divisors (22043984).

22121536 is a wasteful number, since it uses less digits than its factorization.

22121536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122 (or 2112 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 22121536 is about 4703.3536970974. The cubic root of 22121536 is about 280.7189686183.

Adding to 22121536 its reverse (63512122), we get a palindrome (85633658).

The spelling of 22121536 in words is "twenty-two million, one hundred twenty-one thousand, five hundred thirty-six".