22278475 has 12 divisors (see below), whose sum is σ = 27913144. Its totient is φ = 17637120.

The previous prime is 22278439. The next prime is 22278493. The reversal of 22278475 is 57487222.

It is not a de Polignac number, because 22278475 - 2¹¹ = 22276427 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2169 + ... + 7018.

Almost surely, 2^22278475 is an apocalyptic number.

22278475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22278475 is a deficient number, since it is larger than the sum of its proper divisors (5634669).

22278475 is an equidigital number, since it uses as much as digits as its factorization.

22278475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9294 (or 9289 counting only the distinct ones).

The product of its digits is 62720, while the sum is 37.

The square root of 22278475 is about 4720.0079449086. The cubic root of 22278475 is about 281.3812490294.

The spelling of 22278475 in words is "twenty-two million, two hundred seventy-eight thousand, four hundred seventy-five".