22212890 has 16 divisors (see below), whose sum is σ = 45695232. Its totient is φ = 7615824.

The previous prime is 22212889. The next prime is 22212893. The reversal of 22212890 is 9821222.

It is not an unprimeable number, because it can be changed into a prime (22212893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158594 + ... + 158733.

It is an arithmetic number, because the mean of its divisors is an integer number (2855952).

Almost surely, 2^22212890 is an apocalyptic number.

22212890 is an abundant number, since it is smaller than the sum of its proper divisors (23482342).

22212890 is a wasteful number, since it uses less digits than its factorization.

22212890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317341.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 22212890 is about 4713.0552723260. The cubic root of 22212890 is about 281.1048607515.

The spelling of 22212890 in words is "twenty-two million, two hundred twelve thousand, eight hundred ninety".