22445405 has 4 divisors (see below), whose sum is σ = 26934492. Its totient is φ = 17956320.

The previous prime is 22445387. The next prime is 22445407. The reversal of 22445405 is 50454422.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4280761 + 18164644 = 2069^2 + 4262^2 .

It is not a de Polignac number, because 22445405 - 2¹⁰ = 22444381 is a prime.

It is a super-2 number, since 2×22445405² = 1007592411228050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22445407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2244536 + ... + 2244545.

It is an arithmetic number, because the mean of its divisors is an integer number (6733623).

Almost surely, 2^22445405 is an apocalyptic number.

It is an amenable number.

22445405 is a deficient number, since it is larger than the sum of its proper divisors (4489087).

22445405 is an equidigital number, since it uses as much as digits as its factorization.

22445405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4489086.

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 22445405 is about 4737.6581767789. The cubic root of 22445405 is about 282.0822865680.

Adding to 22445405 its reverse (50454422), we get a palindrome (72899827).

It can be divided in two parts, 22445 and 405, that multiplied together give a square (9090225 = 3015²).

The spelling of 22445405 in words is "twenty-two million, four hundred forty-five thousand, four hundred five".