22125478 has 8 divisors (see below), whose sum is σ = 33960168. Its totient is φ = 10805424.

The previous prime is 22125469. The next prime is 22125479. The reversal of 22125478 is 87452122.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22125479) 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 3 ways as a sum of consecutive naturals, for example, 128551 + ... + 128722.

It is an arithmetic number, because the mean of its divisors is an integer number (4245021).

Almost surely, 2^22125478 is an apocalyptic number.

22125478 is a deficient number, since it is larger than the sum of its proper divisors (11834690).

22125478 is a wasteful number, since it uses less digits than its factorization.

22125478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257318.

The product of its digits is 8960, while the sum is 31.

The square root of 22125478 is about 4703.7727411090. The cubic root of 22125478 is about 280.7356420905.

The spelling of 22125478 in words is "twenty-two million, one hundred twenty-five thousand, four hundred seventy-eight".