22180455 has 24 divisors (see below), whose sum is σ = 41942160. Its totient is φ = 10753920.

The previous prime is 22180453. The next prime is 22180463. The reversal of 22180455 is 55408122.

It is a happy number.

It is not a de Polignac number, because 22180455 - 2¹ = 22180453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22180453) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 21910 + ... + 22899.

It is an arithmetic number, because the mean of its divisors is an integer number (1747590).

Almost surely, 2^22180455 is an apocalyptic number.

22180455 is a deficient number, since it is larger than the sum of its proper divisors (19761705).

22180455 is a wasteful number, since it uses less digits than its factorization.

22180455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44831 (or 44828 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 22180455 is about 4709.6130414292. The cubic root of 22180455 is about 280.9679721014.

Adding to 22180455 its reverse (55408122), we get a palindrome (77588577).

The spelling of 22180455 in words is "twenty-two million, one hundred eighty thousand, four hundred fifty-five".