22554478 has 16 divisors (see below), whose sum is σ = 36360144. Its totient is φ = 10454400.

The previous prime is 22554457. The next prime is 22554479. The reversal of 22554478 is 87445522.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22554479) 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, 2673 + ... + 7228.

It is an arithmetic number, because the mean of its divisors is an integer number (2272509).

Almost surely, 2^22554478 is an apocalyptic number.

22554478 is a deficient number, since it is larger than the sum of its proper divisors (13805666).

22554478 is a wasteful number, since it uses less digits than its factorization.

22554478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9987.

The product of its digits is 89600, while the sum is 37.

The square root of 22554478 is about 4749.1555038765. The cubic root of 22554478 is about 282.5384728452.

It can be divided in two parts, 22554 and 478, that added together give a palindrome (23032).

The spelling of 22554478 in words is "twenty-two million, five hundred fifty-four thousand, four hundred seventy-eight".