22455 has 12 divisors (see below), whose sum is σ = 39000. Its totient is φ = 11952.

The previous prime is 22453. The next prime is 22469. The reversal of 22455 is 55422.

22455 = 65² + 66² + ... + 69².

It is not a de Polignac number, because 22455 - 2¹ = 22453 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205 + ... + 294.

It is an arithmetic number, because the mean of its divisors is an integer number (3250).

2²²⁴⁵⁵ is an apocalyptic number.

22455 is a deficient number, since it is larger than the sum of its proper divisors (16545).

22455 is a wasteful number, since it uses less digits than its factorization.

22455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510 (or 507 counting only the distinct ones).

The product of its digits is 400, while the sum is 18.

The square root of 22455 is about 149.8499249249. The cubic root of 22455 is about 28.2122475847.

Adding to 22455 its reverse (55422), we get a palindrome (77877).

The spelling of 22455 in words is "twenty-two thousand, four hundred fifty-five".