22212045 has 48 divisors (see below), whose sum is σ = 41146560. Its totient is φ = 11052288.

The previous prime is 22212019. The next prime is 22212049. The reversal of 22212045 is 54021222.

It is not a de Polignac number, because 22212045 - 2⁹ = 22211533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212049) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70809 + ... + 71121.

It is an arithmetic number, because the mean of its divisors is an integer number (857220).

Almost surely, 2^22212045 is an apocalyptic number.

It is an amenable number.

22212045 is a deficient number, since it is larger than the sum of its proper divisors (18934515).

22212045 is a wasteful number, since it uses less digits than its factorization.

22212045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 423 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 22212045 is about 4712.9656268638. The cubic root of 22212045 is about 281.1012962053.

Adding to 22212045 its reverse (54021222), we get a palindrome (76233267).

The spelling of 22212045 in words is "twenty-two million, two hundred twelve thousand, forty-five".