22278250 has 16 divisors (see below), whose sum is σ = 41705352. Its totient is φ = 8911200.

The previous prime is 22278247. The next prime is 22278287. The reversal of 22278250 is 5287222.

It can be written as a sum of positive squares in 4 ways, for example, as 5900041 + 16378209 = 2429^2 + 4047^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44307 + ... + 44806.

Almost surely, 2^22278250 is an apocalyptic number.

22278250 is a deficient number, since it is larger than the sum of its proper divisors (19427102).

22278250 is an equidigital number, since it uses as much as digits as its factorization.

22278250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89130 (or 89120 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 22278250 is about 4719.9841101427. The cubic root of 22278250 is about 281.3803017624.

The spelling of 22278250 in words is "twenty-two million, two hundred seventy-eight thousand, two hundred fifty".