22012156 has 6 divisors (see below), whose sum is σ = 38521280. Its totient is φ = 11006076.

The previous prime is 22012141. The next prime is 22012157. The reversal of 22012156 is 65121022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2751516 + ... + 2751523.

Almost surely, 2^22012156 is an apocalyptic number.

It is an amenable number.

22012156 is a deficient number, since it is larger than the sum of its proper divisors (16509124).

22012156 is a wasteful number, since it uses less digits than its factorization.

22012156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5503043 (or 5503041 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 22012156 is about 4691.7114148251. The cubic root of 22012156 is about 280.2555320330.

Adding to 22012156 its reverse (65121022), we get a palindrome (87133178).

The spelling of 22012156 in words is "twenty-two million, twelve thousand, one hundred fifty-six".