22254545 has 4 divisors (see below), whose sum is σ = 26705460. Its totient is φ = 17803632.

The previous prime is 22254523. The next prime is 22254563. The reversal of 22254545 is 54545222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54545222 = 2 ⋅27272611.

It can be written as a sum of positive squares in 2 ways, for example, as 14807104 + 7447441 = 3848^2 + 2729^2 .

It is a cyclic number.

It is not a de Polignac number, because 22254545 - 2¹⁰ = 22253521 is a prime.

22254545 is a modest number, since divided by 4545 gives 2225 as remainder.

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 3 ways as a sum of consecutive naturals, for example, 2225450 + ... + 2225459.

It is an arithmetic number, because the mean of its divisors is an integer number (6676365).

Almost surely, 2^22254545 is an apocalyptic number.

It is an amenable number.

22254545 is a deficient number, since it is larger than the sum of its proper divisors (4450915).

22254545 is an equidigital number, since it uses as much as digits as its factorization.

22254545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4450914.

The product of its digits is 16000, while the sum is 29.

The square root of 22254545 is about 4717.4723104646. The cubic root of 22254545 is about 281.2804661647.

Adding to 22254545 its reverse (54545222), we get a palindrome (76799767).

The spelling of 22254545 in words is "twenty-two million, two hundred fifty-four thousand, five hundred forty-five".