22212212 has 18 divisors (see below), whose sum is σ = 42727314. Its totient is φ = 10096240.

The previous prime is 22212199. The next prime is 22212233. The reversal of 22212212 is 21221222.

It can be written as a sum of positive squares in only one way, i.e., 16032016 + 6180196 = 4004^2 + 2486^2 .

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22463 + ... + 23430.

Almost surely, 2^22212212 is an apocalyptic number.

22212212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22212212 is a deficient number, since it is larger than the sum of its proper divisors (20515102).

22212212 is a wasteful number, since it uses less digits than its factorization.

22212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45919 (or 45906 counting only the distinct ones).

The product of its digits is 64, while the sum is 14.

The square root of 22212212 is about 4712.9833439129. The cubic root of 22212212 is about 281.1020006849.

Adding to 22212212 its reverse (21221222), we get a palindrome (43433434).

It can be divided in two parts, 22 and 212212, that multiplied together give a palindrome (4668664).

The spelling of 22212212 in words is "twenty-two million, two hundred twelve thousand, two hundred twelve".