22212506 has 16 divisors (see below), whose sum is σ = 36234216. Its totient is φ = 10169856.

The previous prime is 22212439. The next prime is 22212527. The reversal of 22212506 is 60521222.

It can be written as a sum of positive squares in 4 ways, for example, as 21022225 + 1190281 = 4585^2 + 1091^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7571 + ... + 10086.

Almost surely, 2^22212506 is an apocalyptic number.

22212506 is a deficient number, since it is larger than the sum of its proper divisors (14021710).

22212506 is a wasteful number, since it uses less digits than its factorization.

22212506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17713.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 22212506 is about 4713.0145342445. The cubic root of 22212506 is about 281.1032408980.

Adding to 22212506 its reverse (60521222), we get a palindrome (82733728).

The spelling of 22212506 in words is "twenty-two million, two hundred twelve thousand, five hundred six".