22305445 has 16 divisors (see below), whose sum is σ = 28455408. Its totient is φ = 16727040.

The previous prime is 22305419. The next prime is 22305457. The reversal of 22305445 is 54450322.

It can be written as a sum of positive squares in 8 ways, for example, as 2217121 + 20088324 = 1489^2 + 4482^2 .

It is not a de Polignac number, because 22305445 - 2¹⁹ = 21781157 is a prime.

It is a Duffinian number.

It is a congruent 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, 33415 + ... + 34075.

It is an arithmetic number, because the mean of its divisors is an integer number (1778463).

Almost surely, 2^22305445 is an apocalyptic number.

It is an amenable number.

22305445 is a deficient number, since it is larger than the sum of its proper divisors (6149963).

22305445 is a wasteful number, since it uses less digits than its factorization.

22305445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 22305445 is about 4722.8640674913. The cubic root of 22305445 is about 281.4947485999.

Adding to 22305445 its reverse (54450322), we get a palindrome (76755767).

The spelling of 22305445 in words is "twenty-two million, three hundred five thousand, four hundred forty-five".