22140212 has 6 divisors (see below), whose sum is σ = 38745378. Its totient is φ = 11070104.

The previous prime is 22140199. The next prime is 22140221. The reversal of 22140212 is 21204122.

It can be written as a sum of positive squares in only one way, i.e., 18438436 + 3701776 = 4294^2 + 1924^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2767523 + ... + 2767530.

It is an arithmetic number, because the mean of its divisors is an integer number (6457563).

Almost surely, 2^22140212 is an apocalyptic number.

It is an amenable number.

22140212 is a deficient number, since it is larger than the sum of its proper divisors (16605166).

22140212 is a wasteful number, since it uses less digits than its factorization.

22140212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5535057 (or 5535055 counting only the distinct ones).

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

The square root of 22140212 is about 4705.3386700640. The cubic root of 22140212 is about 280.7979449421.

Adding to 22140212 its reverse (21204122), we get a palindrome (43344334).

The spelling of 22140212 in words is "twenty-two million, one hundred forty thousand, two hundred twelve".