22208545 has 16 divisors (see below), whose sum is σ = 28366848. Its totient is φ = 16633600.

The previous prime is 22208539. The next prime is 22208567. The reversal of 22208545 is 54580222.

It is not a de Polignac number, because 22208545 - 2⁵ = 22208513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18720 + ... + 19870.

It is an arithmetic number, because the mean of its divisors is an integer number (1772928).

Almost surely, 2^22208545 is an apocalyptic number.

It is an amenable number.

22208545 is a deficient number, since it is larger than the sum of its proper divisors (6158303).

22208545 is a wasteful number, since it uses less digits than its factorization.

22208545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 22208545 is about 4712.5942961388. The cubic root of 22208545 is about 281.0865308499.

Adding to 22208545 its reverse (54580222), we get a palindrome (76788767).

The spelling of 22208545 in words is "twenty-two million, two hundred eight thousand, five hundred forty-five".