22278473 has 8 divisors (see below), whose sum is σ = 25510848. Its totient is φ = 19058544.

The previous prime is 22278439. The next prime is 22278493. The reversal of 22278473 is 37487222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22278473 - 2¹² = 22274377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22278433) by changing a digit.

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, 1115 + ... + 6767.

It is an arithmetic number, because the mean of its divisors is an integer number (3188856).

Almost surely, 2^22278473 is an apocalyptic number.

It is an amenable number.

22278473 is a deficient number, since it is larger than the sum of its proper divisors (3232375).

22278473 is an equidigital number, since it uses as much as digits as its factorization.

22278473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6223.

The product of its digits is 37632, while the sum is 35.

The square root of 22278473 is about 4720.0077330445. The cubic root of 22278473 is about 281.3812406093.

The spelling of 22278473 in words is "twenty-two million, two hundred seventy-eight thousand, four hundred seventy-three".