12222536 has 16 divisors (see below), whose sum is σ = 23232300. Its totient is φ = 6027264.

The previous prime is 12222533. The next prime is 12222547. The reversal of 12222536 is 63522221.

It can be written as a sum of positive squares in 2 ways, for example, as 12180100 + 42436 = 3490^2 + 206^2 .

It is not an unprimeable number, because it can be changed into a prime (12222533) 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, 9881 + ... + 11048.

Almost surely, 2^12222536 is an apocalyptic number.

It is an amenable number.

12222536 is a deficient number, since it is larger than the sum of its proper divisors (11009764).

12222536 is a wasteful number, since it uses less digits than its factorization.

12222536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21008 (or 21004 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 12222536 is about 3496.0743699184. The cubic root of 12222536 is about 230.3494121992.

Adding to 12222536 its reverse (63522221), we get a palindrome (75744757).

The spelling of 12222536 in words is "twelve million, two hundred twenty-two thousand, five hundred thirty-six".