22455805 has 4 divisors (see below), whose sum is σ = 26946972. Its totient is φ = 17964640.

The previous prime is 22455799. The next prime is 22455821. The reversal of 22455805 is 50855422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50855422 = 2 ⋅25427711.

It can be written as a sum of positive squares in 2 ways, for example, as 12489156 + 9966649 = 3534^2 + 3157^2 .

It is not a de Polignac number, because 22455805 - 2⁷ = 22455677 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 3 ways as a sum of consecutive naturals, for example, 2245576 + ... + 2245585.

It is an arithmetic number, because the mean of its divisors is an integer number (6736743).

Almost surely, 2^22455805 is an apocalyptic number.

It is an amenable number.

22455805 is a deficient number, since it is larger than the sum of its proper divisors (4491167).

22455805 is an equidigital number, since it uses as much as digits as its factorization.

22455805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4491166.

The product of its (nonzero) digits is 16000, while the sum is 31.

The square root of 22455805 is about 4738.7556383506. The cubic root of 22455805 is about 282.1258471216.

The spelling of 22455805 in words is "twenty-two million, four hundred fifty-five thousand, eight hundred five".